MY EXPERIENCE Tried NixOS around 5 years ago Initially used nixpkgs in Ubuntu For around ~1.5 years Using NixOS for ~ 1 year Maintainer of various packages
NIX/NIXPKGS/NIXOS Nix: Pure, lazy functional language. Not a general purpose language! Used for package description, composition Nixpkgs: Collection of packages. NixOS: Linux + nixpkgs System configuration also managed via Nix