As far as I can tell, `pip` by itself still doesn't even do something basic as resolving the dependency tree first, then download all the packages in parallel, as an basic example. The `uv pip` shim does.

And regardless if you use only uv, or pip-via-uv, or straight up pip, dependencies you install later steps over dependencies you installed earlier, and no tool so far seems to try to solve this, which leads me to conclude it's a Python problem, not a package manager problem.