I'm not sure I agree that the other OEM's would be upset, or that having stock Android is a preference. The other OEMs must feel their custom UI is a value add

I'm not sure I agree that the other OEM's would be upset, or that having stock Android is a preference. The other OEMs must feel their custom UI is a value add, so why would they mind competing with a stock UI? As long as MM isn't the sole Nexus OEM (which they wouldn't be, since it's open source), I'm not seeing the issue. Please elaborate if I'm missing something.