Do you really think the audio jack was removed because of thinness?
Have you seen the inside of a smartphone? Its not just about thinness. There is very little space for anything besides the battery.
Also, removable batteries and the audio jack get in the way of dust/water proofing.
You may think shrinkage is pointless, but that's clearly not what the market or the top designers think. Why do you want a giant, useless, 100+ year old analog port on your 2017 device? I don't. Its ugly.
Have you seen the inside of a smartphone? Its not just about thinness. There is very little space for anything besides the battery.
Also, removable batteries and the audio jack get in the way of dust/water proofing.
You may think shrinkage is pointless, but that's clearly not what the market or the top designers think. Why do you want a giant, useless, 100+ year old analog port on your 2017 device? I don't. Its ugly.