Kotlin doesn't bundle a fundamentally new/better UI toolkit. It's just another JVM language. Most complaints about UI toolkit in "Java" are really about the JD

Kotlin doesn't bundle a fundamentally new/better UI toolkit. It's just another JVM language. Most complaints about UI toolkit in "Java" are really about the JDK, its startup time, and the fact that the UI toolkit in the AWT/Swing days never closed the gap with native apps. Kotlin would just be using the core library UI (or android UI API), so it's no real advantage.