Web developer at the Centre for Effective Altruism primarily focusing on the EA forum. I previously worked in chess programming, and before that as a musician and music teacher. Aside from EA, my interests include Rachmaninoff, Star Trek and the Evans gambit.
FLutter seems interesting, but I think it's potential will always be limited as long as it's tied so closely to Dart. Also, given Google's track record of killing products/platforms with very little warning, I don't think I'd be too comfortable building an entire business in a Google framework that's tied to a Google programming language unless the community around it was big enough to take on maintenance if/when it gets killed, which I don't think is the case here.
+1 for Expo though - it makes life super easy. There's also the simple alternative of just making a responsive website and writing tiny native apps for each platform that just wrap the site in a webview.
This (and your other comment about tables in posts) should now be fixed - thanks for letting us know!