Invest in Kotlin. It's been created by Jetbrain and they are showing clear support for it. I can't say the same about Dart. Google won't support Dart, GWT, Angu

Invest in Kotlin. It's been created by Jetbrain and they are showing clear support for it. I can't say the same about Dart. Google won't support Dart, GWT, Angular, Polymer ... eternally. Yes different purpose, tech and ambitions but too much overlapping. In case of a "more wood behind a fewer arrows" situation, you'll have to pray that the Google gods didn't choose to sunset the stack you bet on.