It brings way more to the table than just being fast, like people are commenting. E.g. it manages Python for your projects, so if you say you want Python 3.12 in your project, and then you do 'uv run python my script.py', it will fetch and run the version of Python you specified, which pip can't do. It also creates lock files, so you know the exact set of Python package dependencies that worked, while you specify them more loosely. Plus a bunch of other stuff..