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Most major companies, to me, seem to be following Apple's example and forcing a shorter support lifecycle for each device, expecting users to simply replace their "obsolete" device with the newest one.
Among major companies, Apple did a better job with supporting old devices. Google Nexus devices become completely out of date after 2 years (too slow to run latest software, and too hard to get hardware repair support). Software wise, Apple could have done a better job as the newer version of iOS is indeed bloated and doesn't run well on old devices. On the other side, Microsoft did great job on supporting Windows XP…
Apple does indeed a better job at supporting older devices, however new iOS releases are basically unusable on devices older than 2 years. I have for example a 2-year old iPad 3 and iOS 8 is usable on it, but for iPhone 4S or IPad 2 the upgrade turned usable devices into unusable ones.