A modern programming language that makes developers happier.

kotlinlang

There’s apparently some technical magic they do with Dart for their hot reload that would be difficult to duplicate with Kotlin (at least for now).  I think I read that there are two different compilers involved, one is a JIT version for hot reload and the other is a AoT version for normal deployment.  I’ve also heard that Flutter is more of a project created by the Dart team than it is a project that uses Dart, if that’s true, then there was only one real language choice to begin with.