After seeing @xenodium mention Emacs Plus as another Emacs-on-Mac build, I thought I'd give it a go (been using railwaycat for yonks).
Took a wee while to get it installed and built, pulled in a lot of stuff, which wasn't shocking given I finally went for nativecomp too, but after that it seemed to work like a drop-in replacement.
No title bar and rounded corners (install/build option) is nice too!
So far not seeing any issues.
@natharari @xenodium Hmm, maybe I *do* update the Application folder manually too and forget.