The Pixel 2 was released on the 17 October 2017^[1], which marks the beginning of its update period. On the 4 October 2021, the Android 12 was released, a next version of the operating system, which not made available for the Pixel 2, thus leaving Pixel 2 on the the previous version of the operating system, the Android 11. This date marks the end of what we consider its update lifetime.

These two dates are 3 full years and 0 full months apart, which gives it B- tier.