> it can't render UI unless someone writes a new UI library from scratch This is true for literally every programming language. You can’t render a UI, in gener

> it can't render UI unless someone writes a new UI library from scratch This is true for literally every programming language. You can’t render a UI, in general, without a target compatible UI library. SwiftUI and UIKit are specific Apple things built on top of CoreAnimation and completely separate from the Swift language. And swift will happily link to C and somewhat C++, so no it’s not all evident why one would copy Apple’s SDK to render UI on a completely separate platform and environment.