Why Android Lollipop for the Nexus 4 and Nexus 7 2012 is so important
Remember last year when Google announced Android 4.4 KitKat, and that it wouldn't be available for the Galaxy Nexus ? Remember how users were furious with Google, so much so they started a petition ? Two reasons were reportedly given. The first, and by far the most important, is that the maker of the chip in the Galaxy Nexus - Texas Instruments - was no longer in the industry and without their help, Google couldn't update the phone even if they wanted to. Which leads us to the second reason, which is that Google only commits to an 18-month update period for their devices. Any device outside of that window is no longer guaranteed updates from Google. And this revelation made people even more furious.
Which is why the Android Lollipop updates for the Nexus 4 and original Nexus 7 are so important. The Nexus 4 is now 24-months old, and the original Nexus 7 is even older, at a whopping 28-months old. Yet both devices received their respective updates to Android Lollipop, the same week as the much younger Nexus 5.
So we shouldn't be worried about Google's "18-month update policy". It's clear by the updates to the 2012 Nexus devices that as long as Google thinks the hardware is capable, and Google has the resources to do so, Nexus devices will continue to receive updates to the newest versions of Android.
PS: The Nexus 10 also received Lollipop, and it's the same age as the Nexus 4.