Not to mention that Flutter experience isn't nothing more than cute to anyone that has experience doing UI design on Common Lisp or Smalltalk environments, which I reckon all of us are quite old for SV standards.
EDIT: Or if you really want to be amazed go play with SELF.
That may be true, but right now, none of them has something as polished and usable as Flutter. And it looks like it will be many years before they do, all the while Flutter keeps getting better. So, if you have time to wait for these other platforms to catch up, go ahead while people who need to write code right now can enjoy something else.
> EDIT: Or if you really want to be amazed go play with SELF.
Oh come'on, are you really suggesting something that looks straight out of the early 90's is something that would amaze anyone today? Or there's something that actually looks and behaves modern out of the Self and Smalltalk world (certainly was not the case last time I checked, a few years back)?
What I am suggesting is that the reasoning why Dart instead of something else is flawed and can only be naively bought by those that lack experience in UI domain.
How pretty those UIs used to look like is secondary.
Flutter is being positioned to rescue Dart, and make it meaningful beyond the AdWord team, the place where it landed when all Dart designers eventually left Google.
Where is the "Google's Commitment to Dart" blog post?