As an outsider myself, it certainly looks like something is going on as more than 20 Nixpkg maintainers left in a week: https://github.com/NixOS/nixpkgs/issues?q=label%3A%228.has%3... It's fine to ask if someone can explain what is going on, it's a waste of everyone's time to say you have no clue and you haven't read anything and it's probably nonsense.
He could have for instance have used that link to verify, and I wouldn't have been thought that it was weird that he said that people were fleeing, without providing proof.
Since this post likely is geared towards engineers and scientifically minded people, and he is in fact calling for people to resign, I suppose so that he or she can take over, is sources and data really to much to ask for?
If your calling for people to resign so that you can take over, which seems quite audacious to begin with, at least you should be able to clearly explain, where the people have failed, so that they can defend themselves.
The onus should be on the article to convince people that something is happening and what it is. Where there's smoke, there may just be someone blowing smoke.