Tokio might is not a panacea either. If they pulled it in std, backwards compatibility would kill most evolution.

At a certain point, one needs to question evolution at any price.

Sure, but I honestly I think std should have things you DON'T want to evolve. Stuff like time/chrono. And YAML.

Pretty sure Rust developers want to move std into crates as well, as well as parts of compiler. And I completely understand them.