The standard library only gets new features when a minor or major Python release happens. That doesn't happen very often which slows down development of anythin

The standard library only gets new features when a minor or major Python release happens. That doesn't happen very often which slows down development of anything in the stdlib significantly to the point that packages in the stdlib effectively "die". To some extent this is intentional because anything that requires more frequent changes is probably not stable enough for inclusion in the stdlib, in practice it does cause some unintentional issues for example rather lacking timezone support.