Why yank?
- These crates no longer work on any supported Rust version (which is 1.80, because the Rust project doesn't support past versions). They're permanently defunct.
- It makes Cargo alert users of the affected versions that there's a problem with them.
- It prevents new users from locking to the broken versions.
and if yanking of them seems like a too drastic measure or done too soon, then breaking them was also done too hard too soon.