Game servers are fairly frequently hosted on Windows, simply because the game server often shares a lot of code with the client (including libraries which may not be cross platform), and game developers are often most familiar with Windows.
VR on Linux depends on your headset mostly AFAIK. Oculus (Quest will work with ALVR streaming, but I had mixed results) and WMR require software that isn't on Linux. Valve Index supposedly has good support and VR games are playable with Proton.
i don't know anymore. i'm getting really annoyed by background processes interfering with my counter-strike ping. like microsoft is checking my mail or uploading some telemetry bs or something. i can't wait to get back on linux.
it's interesting that you say that. i recently installed Portmaster for another reason and have been turning it off when playing CS as it was blocking it. I will look into configuring it. Cheers.
Eh, not really. You can download a windows pro ISO straight from microsoft [0], install it, and then upgrade it to enterprise using the kms client key [1]. That can then be activated using an open source kms server emulator [2] that has a reasonable amount of code you can audit if you're extremely paranoid.
If you don't want to go through the hassle of installing and then upgrading I'm also pretty sure you can upgrade one of the images in the wim offline using dism.