I've been following this discussion about project-centric vs. environment-centric workflows, and I think UV actually enables both patterns quite well. For the "fiddle around until something emerges" workflow that @BrenBarn mentioned, you can absolutely create a general-purpose environment with `uv venv playground` and then use `uv pip install` to gradually build up your experimental dependencies. The project structure can come later.

What's interesting is how UV's speed makes the cost of switching between these approaches nearly zero. Want to quickly test something in isolation? Spin up a temporary environment. Want to formalize an experiment into a project? The migration is painless.

This mirrors what I've seen in other parts of the toolchain - tools like Vite for frontend dev or modern Docker practices all follow this pattern of "fast by default, but flexible when you need it." The velocity improvements compound when your entire toolchain operates on this principle.