> This is a pretty good take. Although I'd further emphasise: knowledge of Linux is "necessary but not sufficient" for using NixOS. NixOS requires additional knowledge, rather than a different set of knowledge.

You can use NixOS to learn more about Linux quite well. You can't really ruin everything by mucking around at the low-level. Just rollback to previous generation. I've definitely learned a lot due to NixOS allowed me to hack with impunity.