I agree that NixOS (and Nix) is difficult to learn and the documentation is generally poor, which I realise is what you’re getting at in your comment,

But I do think we should keep in mind what an incredible project NixOS is. NixOS isn’t just some other Linux distro, repeating pretty much what every distro has done for 40 years. It’s a complete rethink of how a Linux distribution and package manager should work, from first principles, in a way that I don’t think has ever been done before. That’s an incredibly bold thing to do. That alone, as a research project, would be an impressive achievement. But it hasn’t just ended up as some researcher’s PhD thesis. It works in the real world, and it’s built a large community despite its learning curve.

So despite the terrible docs and UX, I have trouble agreeing that it “sucks”!