It turns out that the Motorola Nexus 6 and HTC Nexus 9 are getting the cold shoulder on the Android 7.1.2 update. That was confirmed to DroidLife by a Google employee. Android 7.1.2 is the next planned update and will be out in a few months with some optimizations and bug fixes. Since both the Nexus 9 and Nexus 6 are past their updates-guaranteed timeframe (2 years) it's no surprise to see them left out. On a positive note Google will continue to bring the must-have security patches to both devices for at least another year. That's good news for people reluctant to let go of their...
Source: http://www.gsmarena.com/nexus_6_and_nexus_9_wont_get_android_712-news-23088.php