The gap has closed somewhat for sure, but there's still quite a few nice features in Kotlin that Java doesn't have. https://gist.github.com/makosblade/8fb1f577d

The gap has closed somewhat for sure, but there's still quite a few nice features in Kotlin that Java doesn't have. https://gist.github.com/makosblade/8fb1f577d81f02025784093d25ec1303 https://gist.github.com/makosblade/8fb1f577d81f02025784093d2... does a good job at identifying most. I'd add the semantics around lambdas are much nicer better in Kotlin.