Yes.. as far as I can tell most of this bindings are covered by native extension of 3rd parties. Not always free (but not that expensive), so u have to buy an e

Yes.. as far as I can tell most of this bindings are covered by native extension of 3rd parties. Not always free (but not that expensive), so u have to buy an extension for a quality FacebookSDK integration for example. Still far cheaper than for example Xamarin. But considering that you do not necessarily have any costs in developing Air (you get the compiler, and also good editors, for free) it is not that bad at all. I also do not write native extensions myself, but at least you know there is the option in case u need to access some native library. But yes, in that case it is not really "write it once" anymore.