I’ve been using NixOS for the past few months and it’s been great. Before NixOS I was using Fedora Silverblue so immutable distros aren’t a new thing to me. I like that NixOS has a configuration I can keep backed up. I can copy different options from my desktop to laptop easily. I’m still learning about flakes and the nix language to be able to do more advanced things, but overall NixOS is a great distro if you want something you can configure once and be done.