All the compiler features are there. Others can make similar libraries or other new libraries.
But I don’t see why Apple would ever release that outside Apple land. Swift can still be used for shared logic and server stuff and command line tools and GUIs using other libraries.
Which was open sourced sometime back, and builds iOS and Android apps, which is really neat, because it means your Android app's logic etc is all natively compiled, only a shim of Java to run it. I wish Google would let people publish standard compiled binaries for their OS instead of just making everything rely on the ART.
Honestly, I am jealous of the number of RAD IDEs from the 90s and early 00s we need to start investing in good tooling again.
No more 2 (or maybe 3 for carbon?) implementations.
Hopefully this will let them add features and fix bugs faster.