Doesn't Dart have generics and a lot of other language features that Go chose to omit?
Trouble is its yet another language to learn.
Flutter should have just done the cross platform UI part and offered APIs in a number of languages.
Would Flutter be where it is today without hotreload? Hotreload was a suggestion form the Dart team, Flutter team tried it and where amazed.
Hmm... that is interesting. Guess I will have to see if it uses native controls and is handicapped accessible. Last one is a deal breaker for a "real" UI library.