I really thought Flutter was going to just fade away, but it really seems to be picking up speed, in no small part due to Fuchsia as you mentioned.

Looking at the line up for Google I/O, hearing the rumors as we're about to head into it, and with the newest beta release, I'm starting to think Flutter is past the point of being abandoned any time soon.

The real question for me is when will it be stable enough so that I can put it into production without worrying about major API changes breaking everything on the best update.