one annoying one that's notably missing: There's no way to get rid of the Music.app, and the play/pause hardware button on my M2 macbook is always mapped to that app. I inadvertently press this button all the time and it launches Music.app, taking about 1/4th of the 8gb of shared memory
This annoyingness actually started with Snow Leopard, IIRC. (Though of course it was iTunes and not Music, but still hardcoded)