Quest 3 is amazing, and 3S is super affordable. Both are well worth it. The only drawback is that you have to suck Zuck's dick to get them. But eh, it's tiny.
You can still rocket jump in Destiny2 arena pvp, well grenade, but same feel. Fun way to be Death from Above if you are a more punchy character than the floaty kind.
They haven't gone away. Plenty of Quake 3 Arena servers still up and running. If not Quake 3 Arena, then Xonotic is still pretty active with more modern visuals and pretty good graphics.
I was always more a ut2k4 guy. I need to spend a weekend tracking down and installing the linux binary for that game. But even then the most active servers just play the same few maps. I could play some FaceClassic, but not for hours on end.
I'm also working on fixing an old gamepad I use to use for these games. Unlike ones that use cherry based switches, this one just uses those small, tactile switches with crazy small travel distance.
I need to spend a weekend tracking down and installing the linux binary for that game.
It came on disc. As for patches, there were Linux-specific patches. When I tried some years ago, the game worked after deleting / remaining some shipped libraries and replacing them with system ones. Though today, Wine might be a better choice. I think the Windows version supports OpenGL as well so there's no need for DXVK.