I don't think it's fees. Relative to what they earn directly from customers, fees are a pittance. I figure they have exactly two reasons, both plausible, to b

I don't think it's fees. Relative to what they earn directly from customers, fees are a pittance. I figure they have exactly two reasons, both plausible, to be reluctant to switch the phone over to USB-C. The first is size -- lightning is thinner than USB. But other phones have USB-C, so this is probably not that big a hassle. The second is their customers. For every customer that wants USB-C on their new phone, a dozen more want all their existing accessories and cables to continue to work when they upgrade their phone.