Android device manufacturers make their money when you buy a new device. Apple, on the other hand, makes money when you buy apps (in addition to making money on

Android device manufacturers make their money when you buy a new device. Apple, on the other hand, makes money when you buy apps (in addition to making money on device sales I'm sure). They have an incentive to make sure that the latest OS runs on as many devices as possible, so that developers can release their apps to a wider audience, and so that Apple can make more money. Google wants apps to run on as many devices as possible, so that's why they bend over backwards to support older devices with their SDK. Samsung doesn't have any incentive to update the Galaxy S6 since that won't bring them any additional revenue.