Those devs have a boner for huge corporations for some reason. They hate anything that is “community driven”. Fuck’em, we will manage without them like we always have.

SteamOS isn't a community project. It's a corporate project. It's just that Valve themselves aren't even pushing for native SteamOS games. There was an interview once with one of the SteamOS guys who merely said in passing during an interview that native games are better but that remark was lost in pretty much all reporting. Even developers of games based on Unity don't care to export Linux builds because Windows builds work just fine (until they don't because a Proton update breaks something).