I like the architecture that Flutter has chosen where the only thing you need from the OS is a canvas and everything is painted by Flutter. It gets you a good p

I like the architecture that Flutter has chosen where the only thing you need from the OS is a canvas and everything is painted by Flutter. It gets you a good programming model and predictable results regardless of target. The downside is that in order to produce iOS or Android looking UIs someone needs to create every iOS and Android standard widget, with the same behaviour. If those widgets change in future versions of the OS, or new ones are created then more work needs to be done. This is fine in the current project setup - the work is worth it to Google, but without a corporate backer that's the sort of thing that will fall behind.