Yet services would be better if units sold gets increased. So cheaper models are a must. So it's so far an excellent strategy milking the high end keeping the units sold not fall.
I'm not sure that follows. Apple's a very different company in many ways. Notably, by being dominant in a relatively deep-pocketed userbase, they don't need to worry about the "our profit margin is near zero and likely to shrink further so we have to grow just to stay alive" red queen's race that so many other tech companies find themselves in.