[circlespainter]

Actually bytecode manipulation doesn't make JVM alternative languages impossible, on the opposite Quasar allows them to be easily integrated and investigation/work is ongoing to avoid even having to do that. Plus, depending on the language implementation, in some cases integration is just not needed.

Of course you can use Akka with Kotlin (and Clojure, although not sure how convenient that would be) but there's no idiomatic API (yet?), while Quasar offers them.

[Blackthorn]

I'm really looking forward to when suspendable annotations are no longer needed, so there isn't any special work that needs to be done to support (for example) Scala.

[pron]

We're working on it, but it might require Java 9.