I don't understand the necessity for ultra thin designs. I mean I get the need to have it fit in pockets without ruining pants, but as of now the thickness of my phone allows me to fit it into my pants pocket with ease. Why do we need to keep going? What is the purpose of it? The thinner phones get the harder I find it to use them. Unless we are headed towards some serious change in dynamic when it comes to how we use cellphones I just don't get it.
I've just about convinced myself that the headphone jack is getting nixed not because it's time for you to buy bluetooth headphones but because a waterproof headphone jack is a lot harder than a waterproof USB-C jack. Stick with just the one hole and you can make the phone water resistant a lot more easily. Never mind the fact that the space taken up by the headphone jack is a substantial portion of the interior volume. Added bonus? Now that your headphones are on a data port, rather than four stupid contacts, it's sooper-easy to only allow "authorized" headphones to work.