I would like this to be kind of a survey of sorts, from the collected user-base here.
I still use Speedy Entry via a MIDI keyboard as my preferred method of entering and editing notes. One of my pet peeves with Finale occurred probably over 10 years ago: MM removed the Cancel button from the 'Too many notes in a measure' dialog box.
This forces one to interact with the window, and it remembers the setting from the previous invocation, which is fine. But most of the time, I encounter this window due to a typo on my part, which is what it is. Before, when the Cancel button was there, all I had to do was hit Cmd-period or Escape and be done with it, and get back to my workflow without a hiccup. Now I am forced to interact with the dialog - I have to check to be sure one of the other options is not selected - basically making sure 'leave the measure alone' is selected. A minor but recurring PITA.
Why can't MM reinsert the Cancel button? This is, after all, a long-standing constant in the macOS GUI universe, and no one has ever explained the reasoning behind its removal. Probably because a good, valid reason doesn't exist. When one thinks about it, most all other dialogs have a Cancel button. Why not here???
J D Thomas ThomaStudios