Yep, with a Turing-complete DSL, there's never just one way to do something in Nix. I find the interaction between modules and overlays particularly quirky, and tricky to replicate from public configs that make advance uses of both.

That said, I do appreciate being able to git blame into public configs, as most will include insightful commit messages or references to ticketed issues that include more discussion with informed community members you can follow up with. Being able to peek at how others fixed something before and after helps give context, and with the commits being timestamped, it also helps gauge current relevancy or chronological order to correlate with upstream changelogs.

Are you using flakes with lock files, or nixpins to fix down the hashes of your nix channel inputs? I like fixating my machines to the same exact inputs so that my desktop can serve as a warm local cache when upgrading my laptop.