[fauigerzigerk]

I disagree about scroll lag. There are plenty of WebView apps (and websites obviously) that have zero scrolling issues.

Non-standard UI elements is something I don't personally care about. Some people do, but I think this is an issue that is often overstated (or perhaps rather overestimated as a factor) by platform enthusiasts.

What does matter a great deal to me though is launch speed and battery usage. Mobile apps are often used for short periods of time. They must launch instantly. And battery is the scarcest resource in mobile computing.

Nobody will voluntarily use an app that is slow to launch and shows up at the top of the battery usage table in spite of only having been in use for a few minutes.

As a developer, these are the issues I would like to learn more about in respect of any new cross-platform technologies.