Opening last session
For example, when I click an HTML link, Chrome, if it is not running, opens a new tab and all tabs from the last session, if I previously selected so. It would be nice if Musescore does likewise. Even if I have in General>Program Start>Continue Last Session turned on, when I click on some .mscz file it opens only this file, and previous files are not opened, which is unpleasant surprise.
But if you then open musescore afterwards, it does restore that previous session.
This might be good as some kind of configuration option, but I seem to remember that the current behavior was explicitly asked for by the community as well.