Have you used Fuchsia? Are you developing for it?
You might not like my opinion, but Fuchsia will be dropped as well. I posted a link on the reference from 9to5google.com. That OS is being use in one product, and Google is notorious for killing products. Why do I think that? Well it is only in the Nest Hub products, it has stopped the work to bring Chrome to Fuchsia (so that eliminates the OS to being used in a phone, tablet, or desktop as everyone uses a browser). Google could just opensource Flutter and then have it be picked up or die slowly, that is an option for them. If you think that can't happen, let's not forget about Flash. Between I am pretty sure Google does not care if Alibaba, BMW, and eBay have to re-write their software.