Probably a good way to characterize Kotlin. Scala has a lot of interesting features but also a lot of complexity. And not all of those features are necessarily very good. Arguably, Kotlin was born out of frustration with that as Jetbrains at the time rejected the notion of using Scala internally and instead started the long process of developing their own language. It was mainly intended to be a better Java but also to avoid some of the complexity of Scala.

Groovy's lack of compile time safety is like throwing out the baby with the bathwater. It's just not worth it for me. Kotlin gets you most of the language features but without doing that.