My largest showstoppers with Linux is the lack of DRM support, the lack of “just works” installs, no Parsec (I’ve tried Moonlight/Sunshine many, many, many times, it never works for me), and … this one little thing …
I would use Linux more if either Virtual Desktop or Steam Link worked in Linux. As it stands, neither work, and current implementations of VR in Linux are still alpha / experimental beyond Index / SteamVR direct tethering, not an option for someone that has a cheap standalone headset.