I tried it out one single time and it failed to install or update or something. Had to then find all the places it had inserted itself into in my system. Later I found out it’s based on some LISP variant. Even later I found out you can’t install firefox with it because of gnu or something?
That all combined dissuaded me from touching it again.
nix has terrible documentation, but it’s kinda worked for me, so I’m sticking with it.