Note that the decision to stop the authorization server has been put off indefinitely, and the lack of authorization would only affect your use of Finale if you had to switch to a new computer, but whatever. You would be better off converting to MusicXML if you want to manipulate the files many years from now in another program, but you do you.

Other than complaining about us "Americans" as if we are all responsible for wealth inequality and corporate greed, is there a purpose to your post? 

Didn't see this coming. But for you Americans - I know - the only thing that means is money.

Why troll so blatantly?  Your post has merit, but this is completely unjustified xenophobia.

Are you not up to speed on the fact that they said they will keep the Authorization servers up?

Making sure our content can continue in some way is of course now the most critical thing. 

Yes, you should make PDFs of everything. (I usually do this, as it ensures that nothing "moves" when I open a document just for printing.) Also MusicXML, so that you can work on documents in new environments.

If you produce baroque music, then you should find many features in Dorico useful, such as support for figured bass; and the use of "flows" to have separate pieces within one document. Here's my video on make opera scores with Dorico. 
https://www.youtube.com/watch?v=vuumCtgdYmo

There's also this article on Scoring Notes about early music in Dorico:
https://www.scoringnotes.com/tutorials/adventures-in-early-music-with-dorico-volume-2/

Virtually every instrument (sorry) used by Bach, and the methods of composition and publication he used for everything he wrote, have been superseded since his day.... but his music is still having its day.

I just ordered a KVM switch so I can operate two different macs with the same keyboard and monitors. So there's my permanent fix to keep Finale running, and my 30 years of built up templates, routines, and muscle memory as a lubricant of my creative process. Given my limitations in that regard, the last thing I need is sand in those gears. Now I have time to get comfortable and become just as proficient with Dorico.

I'll probably start tomorrow to turn them into pdf-files...

Absolutely the safest thing to do.

You would be better off converting to MusicXML ...

And there is no guarantee XML will save anything except push the cart further down the road. XML may be the best or should I say only choice of cross platform solution it is far from perfect. Especially if you have complex docs.

 But for you Americans - I know - the only thing that means is money.

If that's your thought, then Musescore is your best choice because they have the most money. Dorico is tiny and Sibelius doesn't seem to  have great Avid support.  Hmmm, Make Music and Finale!!!!!!!!!!!!!

MakeMusic has tons of money but Finale is barely a decimal point on Peaksware’s bottom line. Desktop notation is not a way to make big money as Fender (Notion) and Sonic Scores (Overture, Encore) have learned.

Dorico is Yamaha but they’ve never committed the large amounts of money that some would like—no other explanation exists for version 1’s premature release. It’s possible that Dorico is making money but Steinberg certainly doesn’t act like it. MusicXML import is ok but export is not—they’ve had years to get it right. Steinberg’ a long awaited overhaul of their licensing scheme is 3–4 years late and has been pushed back to 2025 although incremental progress has been made. This deal that has been made with MM is brilliant — a whole lot of new Dorico customers. Some of them will stick around for upgrades and internal crossgrade to other Steinberg products.

Cyprus based Muse Group is flush with cash. Many of their apps are free but MuseScore, Audacity and others are the gateway drugs to Muse Group’s plan for total domination of the music world. The acquisition of Hal Leonard, largest music publisher in the world is the keystone to this plan. They’ve announced that MuseScore 5 is expected to be the de facto notation app for HL—for that, it will have to be good. We’ll see… MuseScore.com is a subscription site for people to upload their scores created in MuseScore only for people who pay $30 per year for unlimited download privileges. They understand that the notation app is not where the money is but they do let you buy sounds for it through MuseHub.

Sibelius is bigger than most people realize but part of its functionality relies on MusicXML from MM. The tools may be free to use but the engineering is not. Avid’s cash cow is ProTools and Sibelius fits into that business plan. Although permanent licenses are available, Avid does their best to keep that a secret. I expect them to roll with the market.

My 2¢

Although permanent licenses are available, Avid does their best to keep that a secret.

Avid states that perpetual licenses are available with links to where you can buy Sibelius Ultimate or Artist Perpetual Licenses right near the top of the Sibelius home page.

Perpetual licenses are also available for Sibelius Artist and Sibelius Ultimate.

If they're trying to be secretive, that is certainly a bad attempt at it.  Avid has been pretty open about listing their perpetual buying options since their acquisition, and their development has been increasingly less one-sided to legacy market segments, as well.

I think Sibelius is pretty good, and has a good UI/UX, but their Support Contract model is what puts a lot of people off. It is far more expensive than cyclical upgrades from any of their competitors.  Dorico is $99 upgrades on an 18-month release cycle.  Sibielius Artist costs more than that to maintain.  Sibelius' mobile apps also depend on either an Active Support Contract or separate subscription to function (beyond Free Tier), while Dorico has a perpetual license purchase with Lifetime Updates for the iPad App (no iPhone or Android, though, which is a big plus for Sibelius).

As for development, Avid has been pretty active and they have added good features.  But I think the "Buck" stops with their Support Contract model for a lot of users, as it doesn't make sense to spend more when they can get everything they need out of Dorico Pro which has a similar MSRP to Sibelius Ultimate (with Crossgrade Pricing on Perpetual Licenses) and a far lower LTCO.

EDIT:  Wording

@ MIKE HALLORAN You might be interested in this tidbit on the MuseScore blog

"We have begun drafting plans to support common workflows found in Finale, particularly note entry and shortcuts. Our ultimate goal is that when a Finale user opens MuseScore Studio, they can select a 'Finale' profile, which adjusts some of the core mechanics so that the experience feels familiar. Another key addition we plan to make is an analogue for the Speedy Entry tool and additional support for Garritan. With this in mind, we'll be talking to Finale users, putting out surveys and polls and taking note of conversations and requests that take place on our forum."

https://musescore.org/en/node/367594

Interesting; thanks Mike. A shame the Dorico folks haven't considered something like that. My impression, which is consistent with what I sensed some time ago, is that Dorico pretty consistently wants users to conform to how it does things, without much flexibility (there is flexibility in the myriad of notation settings, for sure, but the overall gestalt is "do it my way, even if you could change some things around."). Maybe I'm misreading things or being unfair, but I think there is no real interest in having a Finale-ish preference set in Dorico, apart from the one concession to allow pitch before duration during what amounts to their form of Simple Entry. 

You can customize the key shortcuts for every single command in Dorico, so you could conceivably create a Finale-style environment. The thing is: not all the operations are identical or analogous. I suspect that's why no one's done it.

Avid has been pretty open about listing their perpetual buying options since their acquisition

II've helped a number of clients find and purchase those licenses and I know what they go through. Also, by pointing out their support terms, you have made my argument for me.

You might be interested in this tidbit on the MuseScore blog

Not really. Besides, you missed the only important sentence if that post:

Another key addition we plan to make… (bla, bla, bla…)

They haven't done these things yet. When v.5 ships and if it is actually good, I'll be interested. I use 4.4 in my work but have no plans to create a project in it. 

Dorico pretty consistently wants users to conform to how it does things, without much flexibility...

Elaine Gould's book is their bible. Unfortunately, there's much about modern notation that it doesn't cover. Yes, you can modify just about anything in Engraving but Finale is a lot more flexible. If traditional notation is what you want, however, it's hard to go wrong with Dorico. Then there's this:

You can customize the key shortcuts for every single command in Dorico, so you could conceivably create a Finale-style environment. The thing is: not all the operations are identical or analogous. I suspect that's why no one's done it.

If you're willing to put in the work... 

Here's the one I don't understand.

I just ordered a KVM switch so I can operate two different macs with the same keyboard and monitors. So there's my permanent fix to keep Finale running...

Why? Any Mac capable of running Sonoma can create APFS Volumes in Disk Utility, each with its own bootable macOS. Unlike Partitions, APFS Volumes share empty space to the capacity of the drive. For an M2 Studio like mine, that's Ventura, Sonoma and the Sequoia beta. An iMac Pro can have eight bootable Volumes, each with a different OS though only seven can run Finale 27 (High Sierra cannot).

I wanted a hardware solution, as I have other reasons for running two separate actual (not virtual) machines. I also did not miss the escape (weasel) words in MuseScore's announcement, but it is notable nonetheless and you yourself have noted that the future looks like it favors MuseScore long term.

 it is notable nonetheless and you yourself have noted that the future looks like it favors MuseScore long term.

And I believe it, too. But that day isn't here yet. 

To the OP:

Turns out that Finale has a built in ability to mass-convert all Finale files to MusicXML. You want to watch this:

https://www.youtube.com/watch?v=PdpykIdXZBk