What makes you think that Google's goal is to have every single Android phone run unadulterated Android? I'm sure that something like the slow-motion Tizen migr

What makes you think that Google's goal is to have every single Android phone run unadulterated Android? I'm sure that something like the slow-motion Tizen migration that Samsung is doing is a bit much for them, but these kinds of light customizations (tailored to the specific hardware) are probably exactly what they'd like manufacturers to do.