Google just can’t seem to get out of its own way when it comes to fragmentation among its Android platform. We’re not saying there’s an easy solution, but in giving Verizon exclusive rights among wireless carriers in the United States to offer its new Pixel and Pixel XL handsets, it also agreed to let Verizon be in charge of Android system

Source: Hot Hardware – Android Angst: Verizon’s Google Pixel Phones Will Require Carrier Managed OS Updates