The language is "interesting" and I haven't had to learn it in depth yet. Claude and Codex really make it easier to get started with Nix's weirdness -- but that's unfortunate because I feel I'm not going to learn the "real thing" otherwise. And this difficulty makes me curious about Guix though because, even though I'm not LISP expert either, at least I can read it.
Anyway. I'm just shy to "dig deeper" on NixOS because my servers are FreeBSD and I'm already feeling the temptation to swap them with NixOS, which would feel like a betrayal to these long-lived installations... ;-P