I work with Python, Node and Go and I don't think any of them have great package systems. Go has an amazing module isolation system and boy do I wish hiding fun

I work with Python, Node and Go and I don't think any of them have great package systems. Go has an amazing module isolation system and boy do I wish hiding functions within a module/package was as easy in Python as it is in Go. What saves Go is the standard library which makes it possible to write almost everything without needing external dependencies. You've worked with JavaScript and I really don't see how Python is different. I'd argue that Deno and JSR is the only "sane" approach to packages and security, but it's hardly leading and NPM is owned by Microsoft so it's not like you have a great "open source" platform there either. On top of that you have the "fun" parts of ESM vs CommonJS. Anyway, if you're familiar with Node then I think you can view pip and venv as the npm of Python. Things like Poetry are Yarn, made as replacements because pip sort of sucks. UV on the other hand is a drop-in replacement for pip and venv (and other things) similar to how pnpm is basically npm. I can't answer your question on why there isn't a "good" tool to rule them all, but the single tool has been pip since 2014, and since UV is a drop-in, it's very easy to use UV in development and pip in production. I think it's reasonable to worry about what happens when Astral needs to make money for their investors, but that's the beauty of UV compared to a lot of other Python tools. It's extremely easy to replace because it's essentially just smarter pip. I do hope Astral succeeds with their pyx, private registries and so on by the way.