My take on it is that the creator of Nix was very good technically but was not a good BDFL, and that was the root of the problem. He didn’t do a good job of politicking, stepped down, and now Nix is going through a bit of interregnum. I don’t think it’s likely to fail overall though, nixpkgs is too valuable of a resource to just get abandoned. I expect the board seats will be filled by people that know how to politick, and things will continue on after that.
Lessons learned is being a BDFL is hard. IMO Eelco Dolstra failed because he had opinions about things like Anduril sponsorship and flakes, and didn’t just declare “This is the way things are going to be, take it or leave it”. People got really pissed off because there wasn’t a clear message or transparency, which resulted in lots of guessing.