I was somewhat expecting that the flake would include nvim bundled with the vimrc in the folder.

You could then just open nvim in the `nix develop` environment (or even use something like direnv to activate it when you cd in) and have a minimal journaling environment

Yeah, if it included ex. nvim plugins then it would make more sense to me. It's just this particular combination is for installing tools that I struggle to imagine aren't default-installed everywhere, and version-locking some of the most stable programs I've ever used (though I guess neovim might make breaking changes?). Honestly it strikes me as most useful as a 'hello world 2.0' flake demo.