[rgoulter]

I think the second point (nix flakes avoid 'stateful' channels) is the more compelling one. I don't recall an easy way for ensuring channels on different systems pointed to the same value; and flakes basically do what Niv did. And, it's much nicer to just install a flake, rather than having to add channels.

I'm glad to see the first point (flake.nix provides a consistent interface) mentioned. The consistent interface allows for the cli to be much nicer; `nix flake show` can list the outputs.