Apple faces this problem too. There are many ways to make a new device attractive besides making it incompatible with old devices. Support for new radio standa

Apple faces this problem too. There are many ways to make a new device attractive besides making it incompatible with old devices. Support for new radio standards. Larger, brighter, higher resolution screens. More flash storage, a better camera, more attractive industrial design, more built-in apps, and a more polished UI for built-in apps. Will this sort of backwards-compatible improvement always be possible? Probably not. Someday all the specs will be maxed out. But for now it's a good strategy.