Interesting... Apple must have lost their #courage because these MBPs DO have headphone ports on them. So you can't use the same headphones on your iPhone and MBP (without an adapter). Then add to the irony - they removed all the USB type A ports so you can't connect or charge your iPhone to your MBP without some sort of adapter since Apple doesn't make a 1st part USB-C -> Lightning adapter.
Left hand meet right hand!