I would argue that it's ordered by a mix between popularity, need for those packages and ease of installing packages. JS and Python are around the same order of

I would argue that it's ordered by a mix between popularity, need for those packages and ease of installing packages. JS and Python are around the same order of magnitude of popularity, installing packages is way easier in JS than in Python (NPM might not be great but pip is hell). Rust is less popular but it's very easy to have lots of packages, plus what you mentioned about procedural macros. And the standard library, like JS, is relatively small. If you add Go to that (relatively easy to add package, less popular than Python and JS but more than Rust, lots of stuff in the standard library) which would be higher than C/C++ and lower than Python, it does seem to fit. I don't know anything about the C#/Java ecosystems, same with Ruby and Perl. I'd like to know if they fit this "model" too, that would be interesting. It could give some pointers on how to design/make a language evolve to avoid having lots of packages. I'm not sure about the standard library of Rust being bigger. Node ships with an HTTP module, random number generation and regexes. Rust has neither of those. Maybe more functions in each modules?