For one example, a number of years back, I built a python package, env, and version manager. It was built entirely Rust and distributed as a binary. Since I know users would likely have pip installed, it provided an easy way for them to install, regardless of OS.

You could go further like in this case, and use wheels + PyPi for something unrelated to Python.

I believe it is used to cross platform link Rust/maturin wheels, which seems nice because it's one fewer unusual install script to integrate into your project, if zig isn't packaged for Debian yet.

It's useful as a distro-agnostic distribution method. CMake is also installable like this despite having nothing to do with Python.

Or I should say it was useful as a distribution method, because most people had Python already available. Since most distros now don't allow you to install stuff outside a venv you need uv to install things (via `uv tool install`) and we're not yet at the point where most people already have uv installed.

Bundling a browser frontend together with your Python application.

uv and ruff use that Approach. They are Python related tools, but written 100% in Rust.