flutter

Less than 24 hours after Google announcement of Flutter 2.0, And the World is loosing it, because somehow Flutter now works on 6 platforms.
Flutter is not the first SDK to try to do this, in case you forgot; The first thing we learned about Java was "Write once run anywhere" and where are we now with running java for modern platforms ?.
And again there is something called Xamarin by Microsoft since 2011 but never really hit the mainstream market and became the Default.