Comment by ryandrake

I don't even fully understand why "cross-platform UI development" is such a holy grail. Is it that expensive to separate your business logic from UI and write the small UI layer in whatever the platform's "best practice" native language is? Is it that hard to find developers who know more than one programming language? With a lot of these frameworks and higher level abstractions, if you go off the toy-app happy path, you end up fighting the framework and tools more than you're writing your app anyway.