Coming back here. Long time no see.
After a lot of years switching between Debian and Archlinux, I never felt quite right, my computer had often glitch or was slow at times.
I began trying #nixos a few days ago and I am very happy about it!
This machine is now very stable.
I have to learn more about it, I still struggle on some corners (installing the necessary #LaTeX packages for example), but I am happy to say, this was worth a try.