> I can only conclude, that the author of the article, and perhaps even the organization they work in, is unaware of other tools that did the job long before uv. If they really value reproducibility that much, how come they didn't look into the matter before? Things much have been really hastily stitched together, if no one ever looked at existing tooling before, and only now they make things reproducible.

Yes, Poetry has had lock files for years, and pyenv has been able to manage installations, but uv is "an incredibly powerful simplification" that makes it easy to do everything really well with just one tool.