[globular-toast]

That's great. It's your choice and I would happily use poetry to contribute to your projects. But why change pip? We can have both ways. Pip+pip-tools has been around for a lot longer and it's been working very well for freezing dependencies. Even better than npm/yarn.

[scrollaway]

I get you, though pip isn't particularly changing, at least not in the context you seem to be implying? The dependency resolver is a good move, implementation seems poorly conceived though from the sound of the other comments.