Which is why it's cheaper to build multiple native apps... which was the point of the article.

You seem to be laboring under the false impression that I'm disagreeing with the article. I'm agreeing with the article. I'm also pointing out that this situation would indicate there's a market opportunity somewhere. (In the words of Jeff Bezos: Your margin is my opportunity.)

There are a lot of those little frameworks that try and bridge all this together: PhoneGap, Titanium, etc. They're all varying levels of terrible (unless you want to make games, in which case Unity mobile is a pretty solid bet).

So there is a market, people are trying to fill those gaps, and yet none of them seem to be able to bridge the gap in such a way that devs prefer maintaining two or more native apps over one that compiles for multiple devices with a common framework.

So there is a market, but it doesn't look like it's an easy problem to solve.