To me, the two major problems are:

  1. no namespaces

Someone uploads “serde2”? that’s blocked forever. Someone uploads a typo version of a popular package? Too bad for you, learn how to type.

  1. the github connection

If you want to contribute to crates.io you’re bound to github. No gitlab, codeberg, gitee, sourcehut, etc.

Not sure if there are any other problems, but those two seem like the biggest things and #1 is AFAIK not something they ever want to change + it would be difficult to as one would need a migration strategy.

  • Isn’t github used only as the auth provider?

    Still makes you bound to github. Can’t publish to crates.io without github.

    just leaning on the security guarantees of github

    What security guarantee does github have? I can create a new account right now with a random email, sign up for crates.io and type-squat a package.

    If you want, you can use git links when declaring dependencies in Cargo.toml. So alternative to crates.io is basically any git host already!

    Sure, but how do you discover the package? That’s the other function of a registry. Also, I could easily just add another package as a submodule, but that’s not the point.