[steveklabnik]

(have an upvote, no idea why you're in the negative)

I have been thinking about this for the past few years, and I think I'd go so far as to make the standard library "not special." That is, make it work similar to the edition system: cargo new would add a dependency for the latest std at the time, build-std would just be transparent, and you treat it like any other crate.

That said, I am sure there are a zillion issues with this today, especially in Rust itself, but if I were to make a Rust++, this is one of the things I'd consider trying to give a shot.