Yeah that confused me for a second too. I think they're talking about stdx as a single package, even though it contains multiple crates. If you wanted to install a crate from stdx specifically, you'd use this git URL but if you wanted any other package, you'd use another git URL controlled by that project.

So as I understand it, they're not suggesting that we pile many packages into 1 git repo as a sort of pseudo-crates.io, they're just promoting the fact that you can install a package directly from a git URL, rather than using a crate name on a registry.

What seems weird about that model to me is that dependancies will not sync between these individual packages. If package A chooses the canonical git URL for package C, and package B uses a self-hosted version of package C instead, you have two versions of package C.