[steveklabnik]

This is an additional thing I'd really like to gain clarity on in the spec itself. Given that ranges have no definition currently....

Oh, also

> they go to 1.0.0 and promise that they'll never make a breaking change.

That's not what 1.0 means; 2.0 can be produced with breaking changes.

[lmkg]

I think GP means that as a cultural thing, the Rust/Cargo ecosystem has a strong aversion to breaking changes, and as a result tends not to do anything that would require a bump to 2.0.