Stage Manager is confusing as hell. It was designed for iPads in an attempt to give them some semblance of window management but even there it makes no sense. They tried to reinvent window management to be more "simple" but in doing so they made something WAY more complicated to the point where even computer-savvy folks can't figure out how to do basic tasks.

https://youtu.be/sFJuAjyWOc4?t=500

I do. I made myself try it for a week a while back For Science and ended up kinda liking it, at least enough not to bother turning it off again.

Yesterday my coworker asked me what neat window manager I’m using and it took me a moment because I’d forgotten about it.

I don't, but was astonished to find out the majority of my team at work uses it, and has been for a while.