It's not that surprising. Much of Swift and its frameworks are contributed by the open source community.
That's true, but I always thought of Swift as exceptional in this because Swift is a programming language, and this has become the norm for programming languages in my lifetime.
If my biases are already outdated, I'm happy to learn that. Either way, my hopes are the same. :)
Jai has been one exception I can think of here. It hasn’t been publicly released yet, either (you can email/request pre-release access, though)