They don't snap in the current Sonoma beta for me, unless I'm really missing something (always a possibility). I don't mind the existence of Stage Manager on macOS, and I can see its utility for some folks (people who don't use Spaces/multiple desktops, for example), or folks for whom a window-centric way of working makes more sense to them than an app-centric one.

I've been a Mac user since the late Paleolithic and hiding and showing apps feels too ingrained in my head for it to change at this point. hehe. So long as things like Stage Manager add to the Mac user experience rather than replace longstanding conventions, I don't mind.

But then, even those longstanding conventions change, sooner or later. (OS X is not classic Mac OS, of course.) I'll adapt; it'll just feel unusual for a while, in the meantime.