Re: "There's no way to customise this in current software builds: you get what you're given."
Buying a phone every three years isn't rewarding the vendor (I've just stuck a new battery in my Nexus 5, does all one might want from a phone). Buying one every nine months might be. In any case, the best Android phone (by whatever criteria) several two years ago isn't from the same vendor as today, nor is it likely to be the same in two year's time - this means that 'brand loyalty' is limited in its power.