Charging is one of the many issues that it would cause. Maybe the iPhone 7 will have so-called wireless charging too ?

We'd also need a completely different Lightning plug to come even close to how well a right angle 3.5mm one can work when jammed into a pocket.

https://twitter.com/andynormancx/status/671050131526066176
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Remind me to change my signature to something more interesting someday