Scala has a poor type system, and poor support for concurrency. It's terrible DSL problem is not a selling point. Nothing he talked about was crazy or require

Scala has a poor type system, and poor support for concurrency. It's terrible DSL problem is not a selling point. Nothing he talked about was crazy or required writing mind-bending code, that is the point. IntelliJ's scala support is still, to this day, completely broken. Have you tried using it?