But if you had bought Xperia Arc S year ago, you would have official ICS on it now. Some OEMs do care. And some don't but no-one expects them to, because when you buy Huawei or ZTE phone, you either don't care or are willing to get updates from modaco.

With Motorola, it's just sad, but after encrypted bootlockers and soldered everything to make their phones unrepairable and unmodifiable, I would say it is to be expected.