[mumblemumble]

Don't get me wrong; Kotlin is a great language and, if I have to work on the JVM, it's one of my top two picks.

But, being a JVM language, it's still stuck with all of the Java shortcomings that I had listed before: Achieving a decent level of type safety is impossible, the FFI is still a pain to use, and you've got to go through contortions to get really good numeric performance. Because all of those problems are characteristics of the JVM's run-time environment, not the language you're using to target it.

[pjmlp]

Most of those Java shortcomings are in the process of being fixed, while still enjoying one of the best language eco-systems currently available, with libraries for almost any kind of problem domain.