So far, with the 2 games I have had a chance to try, other than having to lower the settings to bottom, they load and play if a little stuttery. With how Proton has improved by leaps and bounds I have no reason to believe it won't keep improving at near the same pace. It is just that darn translation layer combined with the very high requirements of VR that needs to be overcome. If enough linux users go on the vr games and lament there is no linux native option we may get movement on that end. The flat games run so smooth right now I forget which OS I am using, compared to 2 years ago. I even have the disadvantage of an Nvidia card, at least the official driver is better meeting our requirements, shoulda gone AMD...

I don't think Linux VR is particularly bad if you're using steamvr things. Unfortunately WMR on the other hand is much worse (they have to write custom drivers for tracking, and especially controllers are not that far along yet)

Yeah, make sure you get steam from the steam site not flat pack and if you use Nvidia, use the official Nvidia driver, also make sure you select compatibility in steam. Sometimes you need a different Proton version. Turn settings down and the fps will normalize.