Nope, Swift interops with Objective-C runtime to ease code migration from legacy...

		pjmlp 3 days ago \| parent \| context \| favorite \| on: Java Hello World, LLVM Edition Nope, Swift interops with Objective-C runtime to ease code migration from legacy Objective-C code, and existing Apple frameworks predating Swift. A runtime that isn't part of the cross-platform Swift project, with missing functionality being rewriten into Swift.

Yes, and those platforms are worse off for it.