For class based languages I am completely beholden to good tools for refactoring and the like, so rarely does a new language work for me in the long term no mat

For class based languages I am completely beholden to good tools for refactoring and the like, so rarely does a new language work for me in the long term no matter how much fun it is. But these guys make the best tools in the world. And as much as I like the usability of the JVM and the plethora of awesome libraries, I find Java frustrating compared to C#. This Kotlin could be just what I'm looking for.