Not really touched on here, but one thing I found very useful in switching to nix is having your entire system defined in a single repo opens it up for very nice agentic setups. Claude code can now configure my whole system, debug my gpu issues, install software etc, and I can simply git diff to inspect the changes and apply if I agree. On arch sometimes Bluetooth not working or my fingerprint scanner not working becomes some hours of debugging, now I can solve these issues trivially, and if it doesn't work I can restore to an earlier point instead of trails of attempts left through my imperative system