My use-case for NixOS : Got tired of breaking Arch and never ever wanted to solve package dependencies issues again, so I installed it on my workstation laptop.

I havent tried it yet for home server stuff. I am still running containers on a Proxmox host.

Nix documentation is bad/incomplete, so I helped myself with some Youtube videos to get started.

This might get you started https://jvns.ca/blog/2024/01/01/some-notes-on-nixos/