I run a fairly standard arch setup and have had very few issues with games. I’ve done a bit of tinkering with bottles, lutris, etc, but pretty much everything just works first time with steam.
I’ve only had to set a few launch flags, usually for a game to use directx instead of vulkan or vice-versa. Sometimes you can’t play a game on launch, but usually one of the first few patches will get things in working order. Steam deck popularity has done wonders for this aspect.
The most common issue I run into is a game update that will break or degrade the experience. But usually those get fixed fairly quickly in follow up patches. A lot of developers will skip testing in proton (mostly because itll “just work” these days) but i imagine theyll start doing so more often before pushing updates as steam decks and Linux become larger shares of players.
Hopefully we see some of these projects picked up by others. In a weird way, sometimes these sorts of events end up being exactly what a project needs to get forked/transferred and have even more funding/resources thrown at it.
Ive only recently been utilizing mull, mulch, and hypatia, but they’ve been fantastic. All the best to the devs.