I've been playing with Stage Manager a little more, maybe I'll find some use for it. A sympathetic review:
https://www.cultofmac.com/796529/a-s...stage-manager/
A good walk-through:
https://appleinsider.com/articles/22...-of-whats-next
I got happier with it (on iPad) when I discovered that you could keep the Dock hidden (you can also hide the app groups on the left).
There are keyboard shortcuts to cycle through views, and zoom the foreground app to full screen (globe+f). However I wish you could un-zoom with globe-f; as it is, evidently you have to grab and drag the handle in lower left corner to un-zoom.
I'm looking forward to external display support (not enough to install the beta however). Perhaps they'll improve a few other things with that release.