> This not a big deal when pushing layout around a webpage, 
    > but it can be crippling for app development as the app 
    > grows in complexity and you crave native-quality 
    > interactions 

Even on the fastest phones, web-based (including wrapped web components) simply don't offer the native experience. They come close, but there's always a slight but perceptible performance difference; and often a visual difference depending on what you're using.

I realize people really like the theoretical write-once behavior that you get for simple apps when using a javascript platform, but I've been waiting for years for web-based interactions to provide native quality - and I begin to suspect we'll never get there.

If you want native-quality interactions, the only solution is a native application and not common tooling via a javascript layer that runs atop the already not-as-performant-for-UI browser level. This makes your life harder as a developer, but gives your users the best possible experience for their platform.

Alternatively, if you're willing to give your users a good-but-less-than-native-quality experience, that's the niche filled by those tools.