I hope this doesn't come off critical - but what does this offer over a flakes-based `devShell` with `nix develop`?

The two things that stand out that maybe look slightly easier are the processes section, and the pre-commit hooks sections - but from what I can tell these are generally all solveable via native flakes.

Just curious - if this is a valuable tool to add to the arsenal, I'm all for it, but I'm curious what the strong selling points are here over what is already available.