Yeah,performance overhead aside, in Windows it reads and writes fine because of that. Anything thqt changes in Windows however will write the uid of that file as the windows SID I believe, either way I was using regularly the chown -Rf commands to reclaim files back in Linux.
It’s mostly a problem with how steam handles updates downloading to temp folders, etc… It’s the sharing of steam libraries that this happens to most often if you’re back and forth between os’s
I’m one of those weirdos that never thought the screen looked bad to begin with. I’m interested in the upgrade of course, but I can give it another year. The software upgrades alone make it feel like I’m running a new Steam Deck compared to when I got it 1.5 years ago.