Thank you for the recommendations! I don’t mind having some proprietary blobs here and there - as you pointed out, with Steam and the games I was going to run on it, it’s basically necessary anyway, especially with a NVIDIA GPU. However…
I strongly encourage just keeping a 1 or 2 TB drive for Windows, depending on what you play.
All in all, that, the drivers being a bit behind on NVIDIA and the few annoyances that happen with external devices (like you pointed out, with a 3rd party controller) are unfortunately exactly the reasons I might not to switch just yet: while it seems to be more convenient to go full Linux for a few things here and there, but if I am going to need Windows, should I really bother keeping both installations? I’d have to buy a new, larger NVMe because my system doesn’t support that for now, reinstall everything anyway… And so far, I’ve been able to do everything I need without needing two parallel systems.