What a terribly obvious misnomer. 1. OEMs deserve 90% of the blame for being slow. CM is proof that OEMs are absurdly slow at updates, almost surely because th

What a terribly obvious misnomer. 1. OEMs deserve 90% of the blame for being slow. CM is proof that OEMs are absurdly slow at updates, almost surely because they put absolutely no priority on supporting old devices. People blame Google because OEMs are greedy and lazy and are more interested in making the next buck than support an already cashed-out device. 2. Building a ROM for a phone is wildly different than adding hardware support to the Linux kernel or bundling drivers. Number one, because that is flat out impossible to do on mobile devices due to reasons that I only understand as "component manufacturers have tight control of software radio components", to the point that it makes it nie impossible for Google to distribute everything to make complete images even for their own Nexus phones. 3. OEMs over customize because they have access to the source code. They can do >= 90% of their customization using stock Android and just change what ships by default, but because they have the source, they tear into it and modify every last piece. If you don't think this would happen if OEMs had source for Windows, you're crazy.