While mere speculation, I do not think he is leaving over Maps directly. I personally think there was internal tension over making sir Jony head of leadership a

While mere speculation, I do not think he is leaving over Maps directly. I personally think there was internal tension over making sir Jony head of leadership and direction for Human Interface and he quit over that -- also there is the possibility that he was perhaps looking to run Apple as CEO at some point but that does not seem to be in the cards.