Important to note that NixOS has both a rolling release and point release version.

Most mainstream distro’s can do all of that without a CLI.

A simple bash script is not reproducible or deterministic. Also a filesystem rollback is not the same as NixOS’s generation based rollback.

Also, NixOS doesn’t just install packages, all system configuration is done declaratively, which would be a very bad idea to do via a bash script.

I like flatpak for gui apps, especially proprietary ones. For all open source apps i’ll be sticking with Nixpkgs.

The generic keys have been known for a very long time. I highly doubt it means you’ll get anything else out of them.