Me, too! I first thought it was just clickbait, but then I realized it was the author's genuine thought, which is sad. I wonder why the popular Linux distro ranking site DistroWatch [0] is not called "OSWatch"! Well, I don't. The "OS" is CentOS, and NixOS is just branding. NixOS is a huge mod, yet it's still a distro!
This is what Wikipedia says about NixOS:
> NixOS is a Linux distribution built around the Nix package manager.
This is about CentOS:
> CentOS (from Community Enterprise Operating System; also known as CentOS Linux) is a discontinued Linux distribution that provided a free and open-source community-supported computing platform, functionally compatible with its upstream source, Red Hat Enterprise Linux (RHEL).
This is what Wikipedia says about NixOS:
> NixOS is a Linux distribution built around the Nix package manager.
This is about CentOS:
> CentOS (from Community Enterprise Operating System; also known as CentOS Linux) is a discontinued Linux distribution that provided a free and open-source community-supported computing platform, functionally compatible with its upstream source, Red Hat Enterprise Linux (RHEL).
[0]: https://distrowatch.com/