[Someone]

A month ago (https://android-developers.googleblog.com/2019/05/google-io-...):

”Today we’re announcing another big step: Android development will become increasingly Kotlin-first. Many new Jetpack APIs and features will be offered first in Kotlin. If you’re starting a new project, you should write it in Kotlin”

“Just use Kotlin” doesn’t help for the licensing issue, though, if you keep using Oracle’s JVM.