The problem is texting was around way before the iPhone. So it wasn't an opportunity for Apple to create greater stickiness for iOS vs other operating systems.

The problem is texting was around way before the iPhone. So it wasn't an opportunity for Apple to create greater stickiness for iOS vs other operating systems. Apple could create a P2P offering that worked easily with non iOS phones. But that would appear to defeat the stated purpose of building such a service. Or at least significantly reduce it.