As someone who was working in the mobile app field before the iPhone came out, how "extremely cross-platform" is Haxe? I mean... Back then J2ME (now JME and pr

As someone who was working in the mobile app field before the iPhone came out, how "extremely cross-platform" is Haxe? I mean... Back then J2ME (now JME and pretty much dead) was supposed to be cross-platform and it was a living hell. On the Blackberries is was even a special kind of hell, even less compatible. (and on Qualcomm we had to port to C++/BREW).