The main difference being that Cargo is both for distributing and building locally AND it’s the blessed way of building all Rust projects. This means that as lo

The main difference being that Cargo is both for distributing and building locally AND it’s the blessed way of building all Rust projects. This means that as long as you have a copy of the codebase, it’s going to be using Cargo & you can add it with Cargo regardless of it being published formally to crates.io (the copy can even be remote since you can build from a git reference directly). Python packaging requires more work although there’s typically no build step so you can probably just __import__ the path and move on. JS is closer to Rust in that package.json is the standard way to manage components and you can import them even if they’re not published via the npm registry. Pretending the situation isn’t very different for C++ is completely ignoring the standard committee’s complete abdication of standardizing a build system (which by the way if they’re not going to do, why are they bothering to standardize anything?)