Of course the entire binary will never be the same, but the implementation of (for example) DateComponents.swift in OSS swift-foundation will be the same implem

Of course the entire binary will never be the same, but the implementation of (for example) DateComponents.swift in OSS swift-foundation will be the same implementation that is used to build the OS library. Going forward, the bedrock of both the OSS package and the platform [Core]Foundation.framework will be swift-foundation. This is distinct from SCF, which was a novel Swift wrapper around CoreFoundation.