My personal bias: I really don't like NixOS, tried it for four months and found that the config file was an annoying way of handling general system and package management (especially since there was a completely parallel nix package manager with a cli interface which I find redundant at best)
Bro actin like he got some serious dirt on the project with his emails, but all he talks about is evangeleon, how moderation is hard, one blogpost from the big boss of the project that he eleges (idk how to spell that) wasn't accepted well (no sauce tho), and how some maintainer(s?) left. This article is a waste of time, and adds nothing to the discussion