Asking honestly since I've seen Nix and NixOS show up on the front page here a bunch over the years, but never used it: my impression of it is that it fills the

Asking honestly since I've seen Nix and NixOS show up on the front page here a bunch over the years, but never used it: my impression of it is that it fills the same kind of niche as the Zig or Nim languages: conceptually pretty cool, but not widely adopted outside of a dedicated core user group. Is this really the case for Nix, or is it actually widely adopted, and this adoption is underreported? If it's not actually widely adopted, what do you think are the biggest obstacles in Nix's way?