This proposal makes me scared for my bet on going full with NixOS.
To me it seems like a really complicated technical solution to a social problem(the monorepo approach doesn't scale).
If more people are needed to maintain the nixpkgs repo why instead not focus on ways to increase the community size.
Missing docs have been a problem for NixOS for a long time, most awesome features are lost on some proficient users tweets. Having better docs would do wonders for the community.
I think if NixOS wants to copy some of Rust strengths, quality docs should be its first priority.