[Felminor]

Totally forgot about what I really like:

Quarkus with kotlin.

Kotlin makes so much more fun than java, runs on JVM too. Unfortunately it adds a kotlin complexity layer over quarkus which can add issues

[snowe2010]

We use Kotlin with quarkus with no issues. I love it. We also compile with graalvm and deploy on AWS lambda. It's amazing honestly. But it's complicated. I wouldn't really suggest it unless it fits your use case.