The GP's stated benefits are listed directly on the main page of the NixOS website, and was in reply to a comment about Nix in NixOS. You seem to be talking abo

The GP's stated benefits are listed directly on the main page of the NixOS website, and was in reply to a comment about Nix in NixOS. You seem to be talking about using Nix standalone; if you are, the GP's comment does not necessarily apply to you.