I've worked with ex Apple supply chain people, and they were very used to operating at massive scale and the leverage that came with it. This led to some some unhappy suppliers some of which walked because they felt we were being too demanding. I don't want to overgeneralize, some of the issue was likely the culture of this particular team, but I could definitely see growing pains as they move into a new vertical with suppliers they can't push around as much. There's a lot more to it than "Apple is good GSM"