To clarify there are several very popular online games with anti-cheat that will never work BUT there are also a ton of other multiplayer games that do work great. You aren’t going to be stuck in single-player only moving to Linux, you’ll just miss out on a handful of popular competitive games.

Ocenaudio for audio editing. It’s not FOSS but it’s native, simple to use, and doesn’t have backend library issues I kept having with audacity.