[aamar]

The iPhone numbering/naming scheme seems pretty simple and organized to me. Minor upgrades to the iPhone 7 are the 7+ and maybe 7s; major upgrade will be the iPhone 8.

On the other hand, the iPad's numbering was eliminated on its 'primary' model around the time of what would have been the iPad 3. That, in conjunction with the four different sizing options, seems moderately confusing and not consumer friendly. Not sure that that's why the tablet market is declining, but it might be contributing.