If apple only put usb-c into their rmb which is aimed at the mass market. I don't think there is much hope for their pro line to keep standard usb.
The average Joe who wants a nice looking laptop and goes out and buys a rmb in pink or gold may not even know what usb c is and when compared to a mbp user is probably much less likely to even know he can't just plug in his phone/external drive.
The average Joe who wants a nice looking laptop and goes out and buys a rmb in pink or gold may not even know what usb c is and when compared to a mbp user is probably much less likely to even know he can't just plug in his phone/external drive.