I’m not one who values languages based on number of features alone (otherwise C++ or C# would be my all go), but based on the synergy of them. I think in this case, Scala is a really elegant language with many features that all come from some simple to understand primitives, for example everything is an object, that creates a highly coherent language.

This is in contrast with Kotlin, that tries to gain popularity by including many features, but always feeling “just sugar syntax over Java” to me.