> a language developed entirely by and for writing Apple ecosystem products

So, apparently you didn't even read the article, as it is explicitly stated that this was not the intention or direction of Swift.

> Among other things, there's no way to disable objective-c interop, even though it complicates the language and feels like someone merged smalltalk, C++, and ML—not a pretty combination. But—literally the only reason you'd enable that would be to work with Cocoa/UIKit.

Swift on Linux does not use any of the ObjC runtime features that are used on Apple platforms.