Agree, Flutter is top notch. I've had trouble pitching it as a technical solution, though. For one, I think word is out that Google will kill projects mercilessly, and there's an odd dynamic between the promotion Flutter and Kotlin/AndroidX. Generally, Kotlin comes out on top as the "safer" choice.

It's a shame, though, because the primary advantage I see with Flutter is its superior UI framework. It's leagues better than the AndroidX compatibility lasagna, in terms of architecture and DX. So it really stands out as a cross platform solution not just across iOS and Android, but especially across the Android ecosystem itself.