Support is ... haphazard at best. Integration into OS package suites require the devs of different subsystems to agree on a set of dependencies actually supported by mainstream distros.
SteamVR Linux needs serious updating.
Getting a Quest to VR wirelessly in a manner that is actually usable is an exercise harder than brain surgery.
I'm still holding out hope for WMR to go open source. Loads of folks are offloading their HP G2s and it's a decent set for the money. If Microsoft really wants to support open source and not make this popular 5 year old set e-waste they have a simple win here.
I sold mine one recently and went with a HTV Vive Cosmos pro so I can keep using my Windows specific VR games. Sucks to have them kill my less than 1 year old Christmas gift, but it didn't really feel like there was much that I could do about it.
I'm not planning to sell. I have my nephew my old gaming laptop and since it has an i7-6700HQ it'll stay on Win10. In a year or so I'll give him my G2.
I haven't tried. I've got one PC in the apartment still on Windows 10. I use it for streaming PCVR to Quest 3. Once Windows 10 is dead I'll try streaming via ALVR.
I used an oculus quest to connect to my PC and it worked alright. I just needed the free world version of mesa and I still had to use x. But that was 9ish months ago