I'm not sure that comment applies here. The suggest Dropbox replacement was more complicated than Dropbox, and had more steps. On the other hand, Nix is about the same amount of complexity, and same number of steps for the developer.

Yes, the parent comment looks a bit complicated, but that's just the one time setup, not something that needs to be done by every developer. And Codespaces will require some of that setup too; it's not like it'll magically know what packages and dependancies your project requires to build.