I'm inclined to agree with you. A JVM-based developer with no idea of Scala or at least Kotlin raises questions. But in the last year I have worked with at leas

I'm inclined to agree with you. A JVM-based developer with no idea of Scala or at least Kotlin raises questions. But in the last year I have worked with at least one smart guy/productive developer who is not into either. So YMMV I guess..