bit late now since the win11 migration is mostly over, but you still might be able to get your hands on an old office pc that's perfectly fine but got replaced for win11's retarded tpm2 requirement.
won't be the fastest machine (so most likely no ps3 emulation and recent AAA slop), but for everything else should be fine tipping your toes being part of the mustard race.
worse case you have to put in a proper GPU, those can be bought used if you're not looking for the latest to generate AI slop.
then just hook it up to a TV, run steam in big picture and everything feels like before.
Devs cannot even handle AMD/NJEWDIA fuckery and you expect them to give a single fuck about the 8000000 linux forks
that's not how it works, you release officially for one distribution (usually ubuntu), beyond that linux users are more than capable to adapt it to other distributions themselves.
then, if you are a smart dev, you fix any possibly remaining issues silently (anything else being unofficial *winkwink*), if you are a retarded dev like most these days, you whine about it on twitter.
that's how quite a few handle their "linux" version already by making sure the windows version works well with proton...