I really don't see flutter surviving long term. As it matures it will accumulate hard to solve issues and making shiny new thing will be easier. Does Google have track record of maintaining these kind of projects?
Several large Chinese companies are quite heavily invested in the ecosystem. Alibaba, Baidu and Bytedance use it extensively. Nubank's using Flutter too I think. That one is like 50 million users alone? So even if Google let it die given that Flutter is open source I don't see it going away any more.
That was true 3 years back, but with all the recent developments (especially the new impeller upgrade against iOS jank), there's a lot to be optimistic about the longevity of flutter. Meanwhile I haven't seen much development from React Native, although granted I didn't bother checking either. Flutter is so much easier to work with than React Native or even React.
