[decryption]

Apple did! The Game Porting Toolkit does (I think) what you're talking about and what Steam did for Linux.

https://developer.apple.com/games/game-porting-toolkit/

Why it hasn't taken off, I have no idea.

[theshrike79]

Without even opening the link "porting toolkit" seems like something I need to put effort into.

Proton + Steam is pretty much just clicking "Allow Linux" on a dashboard somewhere and then it'll just work.

[pjmlp]

Hence why studios have no reason to bother with GNU/Linux even if they happen to target Android/Linux, let Valve do the work.

[theshrike79]

There was some anecdotal stuff floating around some years ago that smaller studios stopped doing custom Linux builds because Proton+Windows ran faster than their native build =)