I was fully resigned to macOS 13.3 not bringing any improvement to Stage Manager, but it looks like they just might have touched up the code a bit. Moving windows between the laptop and external screens used to be completely unworkable (possibly because my displays aren’t arranged simply one on top of the other) and from a quick test it seems actually usable now.
Guess I’m gonna reorganize my entire desk so I can finally make use of the external screen.
(Yes I still like Stage Manager on Mac.)
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