The only thing I don't like with Kotlin is the lack of a decent syntax for list and map literals. Unfortunately it seems to have resolved in a dead end as far a

The only thing I don't like with Kotlin is the lack of a decent syntax for list and map literals. Unfortunately it seems to have resolved in a dead end as far as implementation into the language goes. It's still a nice language but quite awkward and ugly in the context of expressing a lot of literal data. From that perspective Groovy is much nicer ...