Damm, for that price you can buy a ds, 3ds, Wii u and a switch (V1) and have money to spare.

For getting a idea of how your games run check out protondb.com you can add your steam library to easily check your library.

For epic, gog and Amazon prime gaming you got heroic (https://heroicgameslauncher.com/) it also uses proton to play windows games.

GPU drivers are fine. AMD just works for gaming and Nvidia (depending on distro you need to install the drivers, search how to install them and dont install them from the Nvidia website) works fine if you just have a simple setup. The Nvidia drivers are improving alot by the way.

Random mouse, keyboard and other stuff is a hot or miss. Most of the time basic stuff simply works, but maybe there are no drivers/programma to set rgb or macros. (P.s. Try open rgb for rgb stuff)

You can always try with a dual boot. If you not used to Linux and like gaming maybe something like pop os

Oh yeah good idea!

I use a quest 1 on Linux.(According to the alvr the quest 3 is also fully supported) Played about the last half of half life on Linux.

However some VR games just don’t run well under proton I still have windows installed for that. Even if i didn’t boot into windows for a half year now.

Also first recommend installing Linux in dual boot with windows if you don’t know if al your programs/games work. Nowadays most stuff works but you can always keep windows for just in case.

Everytime I hear something about Plex I become a bit happier with my choice for Emby as media server.

At the time of building my then server I could choice between them(jellyfin wasn’t a thing yet). Luckily I picked emby

Just use KDE connect (it’s also available on windows). Just open your file browser and select the last screenshot on your phone. (It mount your phone as removable media)

It’s all local and you don’t have to send any extra info to Microsoft as added bonus.

All this new and fancy stuff is already solved on Linux for a long time and on windows long before Microsoft “invented” it. By great free and open source projects.