@Sean Corfield Unfortunately, yes. His reasoning is: he has to show something more than less lines of code to allow it to pass. There are paradigm shifts in Kotlin, but it’s hard to show it to a person who wants performance improvement as the criterion of a new language. As a developer he is excited by the language and what he has to offer, as a person who is answerable to people above him, he needs performance improvement in his arsenal. He has been burned recently and wants to tread carefully.