Kotlin is absolutely massive, and they often add n small features instead of a single more complicated one, so I don't think the comparision to Scala fits.

Funnily enough kotlin added some rushed, delivered syntax sugar in the form of `when` and java just came and added proper pattern matching with algebraic data types and exhaustiveness checking into the platform itself, making it better than the guest language at its own game. Meanwhile I never felt this "landing page growing" mindset with Scala.