As I write this list, I’m grooving to my music playlist on a pair of headphones connected to my smartphone via a 3.5mm audio jack. My son may not listen to Barnes and Barnes’ “Fish Heads” in a loop for three hours like his dad, but he will still be using 3.5mm audio jacks when he’s in college.
Despite the advent of wireless Bluetooth headphones and convenient USB headsets, almost every notebook, tablet, media player and phone has at least one 3.5mm jack. There’s just too much invested in backward compatibility with 3.5mm headphones for a big change to occur in the next two decades.
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