TBH, I really liked the NixOS Community Survey. NixOS Community Survey 2022 I think it’s nice to be able to point to for a taste of how some are using nix; and for (tbh) the key themes in responses.
I’m also excited about https://devenv.sh/
I haven’t tracked down the PR which affected it, but I do like that now nix flake show only lists the current host architecture for its outputs.