If I do this my apps are limited to the lowest common denominator which means supporting either 6% best case of Android users, or going back further, supporting

If I do this my apps are limited to the lowest common denominator which means supporting either 6% best case of Android users, or going back further, supporting say 30%, if Flutter will even support doing so, and giving up many features thus hurting not only my Android users, but also my iOS users who could be way ahead and who stay updated. And tying the future of my project to Google? No thank you. Have you seen any Google projects lately? Shallow and not impressive at all, and often abandoned. OMG I have to code everything twice you say that like coding is not fun, or like it's the end of the world. How about this: code everything once, and target iOS. If cross platform is really needed, go with something from a serious company, like Xamarin.