This is a rather small userbase when it comes to enterprise.

Especially because Swift will never be as versatile as Python or as efficient as Rust.

And then there's also Go, C# and Kotlin with much better tooling.

That's the same dynamic as web devs writing React Native apps: you won't expect them to contribute extensions that manipulate local apfs metadata for instance.

So while it's nice to have them use the tools, you still need people who primarily care for non Apple platform and embrance swift for their purpose to have it expand.