Not sure if this is exactly what you meant by discoverability, but this page helps with at least seeing what configuration options are available: https://nixos.

Not sure if this is exactly what you meant by discoverability, but this page helps with at least seeing what configuration options are available: https://nixos.org/nixos/options.html# https://nixos.org/nixos/options.html# -- no other distro has anything similar as far as I know. The language is not too bad, but how it should be used is the missing part. Like a cookbook or a properly populated Stack Overflow site. When I was on Linux, I liked to distro hop few times a year. Whenever I got back to NixOS, I felt that I had to relearn everything, and that there was nothing to grasp on to. I always take that as a bad smell.