And what's the practical difference between death and deprecation? As the Swift standard library grows, and it becomes the widely preferred language for iOS and Mac development, isn't that a form of death?
Simply: I don't think Apple are going to suddenly replace Foundation (or any other Cocoa framework) with a Swift only version. They'll just iterate the frameworks they currently have to make them a little more modern and a little more Swift friendly.
Not that they could anyway: according to Chris Lattner, Swift is currently 1-2 years away from including a language "resilience model" that would allow safe linking to frameworks built with a different version of Swift. Until then, the Swift standard library needs to remain as small as possible because it is statically linked into every Swift app (it can't be shipped separately with the OS).
