That little headphone socket on your smartphone dates all the way back to 1964. Its bigger brother, the 6.35mm jack is one of the oldest connector standards still in use, and got its start in 1878. While various music devices and smartphones have gone without the 3.5mm socket over the years, it's still almost universal. But the new iPhone 7 is rumoured to be using the lightning connector exclusively, and the recently launched Lenovo Moto Z is 3.5mm free. But with almost everyone owning a pair of headphones using the 3.5mm jack, is it too soon to move on?