Valve inventing a portable game runtime that just works on all Linux distros without game studios needing an entire department to handle the dependency hell of Linux NIHisn would solve that issue.
Does it actually work though? Ironically my experience is that windows api + proton are a more stable target than anything linux native. Even valve doesn't get it always right when shipping linux versions of their own games. See https://steamcommunity.com/sharedfiles/filedetails/?id=30358... for example.