This is an interesting take, especially coming from a non-gaming focused tech website like Ars Technica. I feel like it’s been too long since people were truly hyped about half life 3 though, and this wouldn’t be enough, even if Valve did go through with it.
People are increasingly unhappy with windows though, and the EoL of windows 10 may push people to Linux anyways.
I think Valve knows better than to make an exclusive. Now will they optimise it for SD? I don’t think there’s any doubt about that.