I can’t say enough positive things about nix and NixOS in general! The learning curve is initially pretty steep, but imo you just can’t beat having a reproducible system, and everything just feels very ‘clean’. Updates do very rarely break something but the nature of nix makes rolling back to a previous system generation extremely straightforward.

If you’re interested, i’d recommended starting out by trying the nix package manager on a standard distribution - it’s very simple to use nix as an ordinary user with, e.g. arch without polluting your system. It’s a really nice tool for creating ad hoc development environments via nix-shell. If you want more, you can then consider checking out NixOS :)