[palata]

> If the iOS app developer and designer market declines

That's a pretty huge "if". If the web developer market declines, then native will be better, too.

> In reality, the developer/designer market, money available to develop apps, money and resources available to maintain apps, etc are all additional constraints for real apps, and native apps have significant disadvantages in those other constraints.

In my experience, the reality is much more nuanced than that. There are plenty of mobile devs, and many will tell you that they are not slower writing two apps (iOS/Android) than writing one cross-platform one. I don't know a single mobile dev who likes a cross-platform framework better than the native experience, too.

No really, I think cross-platform seems cheaper if you are a manager (and don't really have experience with any of those frameworks) or if you are a web dev (and don't really have experience with mobile frameworks).