alt Hacker NewsCool.
After using Nix for a while I got pretty fed up with the (subjective) unintuitiveness of the language†. It wasn't even that I thought it was a bad language, I just couldn't het it to click (and doubly so after the advent of flakes).
All the same it seems to me like if you grok it it's a great fit for constructing recipes for building things reliably that are part of huge dependency trees, and so it's natural that it would be a good website generator too.
† Luckily others shared this issue, and the result was Guix which solves that problem while introducing its own.
It's a pretty special language, lazy evaluation and very basic types. However after spending the time to learn it to an intermediate level I think it's pretty great.
Flakes are not great however, they're what happens when you "overdo it", sadly the momentum is behind flakes because some UX/DX improvements came along with them (lockfile in repo).
I think the stdenv being built on bash is worse than Nix language.
Module system errors can be very hard to troubleshoot because of lazy eval, sadly I can't see a reasonable solution without worse tradeoffs :(