E.g. more flexible than Cargo in that you could have a large codebase with two different versions of a dependency isolated to their compile units allowing you to gradually adopt a breaking change dependency in a large code base. I was kinda bowled over with that feature (the isolation part is key).

For python I’m finding poetry much more ergonomic than pipenv, it’s not just the speed difference it’s the convenience of one tool which aligns with what you’re saying although the existence of poetry doesn’t delete historical aberrations in Python’s long history.