Holy shit the comments on this one are vile.
If you don't like the article, don't read it and go on with your day.
The footer of the blog shows a Nix file structure, skimming their blog they wrote a bunch of articles and guides for Nix, checking their repo they have a bunch of Nix work, they're not exactly a nobody (if you couldn't judge from the people saying they'll miss them on the Nix forum post)
This entire article is an extension of https://save-nix-together.org which is the actual thing that sparked the the gasoline covered Nix community, this will probably seem more coherent with that background.