You decided to reward Motorola with money for not updating. Why should "Google care more" about you when you decided to give money to manufacturer which doesn't update software?
My Nexus 9 runs 7.1.1. My Nexus 5X runs 7.1.1. My Pixel XL runs 7.1.1. Vote with your wallet or complain instead of giving money to OEMs that screw you.