> iOS's popularity is largely due to its intuitive UI.
I think that's true, which is why I'm so interested in iOS 7. IMHO, iOS has become much less intuitive—where I once found that ordinary users could understand and use most of the functions of the device, I find that no longer the case. For example, I find it unintuitive that the Home button does different things depending on how many times it's tapped, or for how long. The notification center gives no indication that it exists at all. The multitasking tray must be swiped left—twice—to reveal a volume control. Etc, etc.