Earlier quoted context omitted.
Yep. DRM’d online stuff and VR mainstays (Beat Saber, primarily) are the two sets of games that are keeping me tethered to Windows at the moment. VR games can be played via a Windows VM with GPU passthrough but for DRM’d online games you don’t really have any other option, at least if you don’t want to get banned.
Beat Saber does work on Linux if you can deal with VR on Linux’s quirks.
Up to date compelling SteamVR options are starting to appear however so I might see if I can move over to one of those in the next year or two.