The headphone jack has been a constant piece of I/O across Apple devices since 1984, a whopping 32 years. Additionally, the port and its underlying standard has not changed much. It's outlived everything from the floppy drive to CDs, VGA, and more.
Apple I/O standards last about 15 years, give or take. Even the floppy, which seemed like a monumental change when it was removed from the iMac, was only around for 15 years. We take the traditional USB connector for granted, but it’s also been around for about 18 years, and you can see how the new MacBook is ushering it out in favor of USB-C. It’s an interesting cycle.
Check out the chart below to see the life cycle of the various interfaces used by Apple. You can follow iClarified on Twitter, Facebook, Google+, or RSS for updates on the company's plans for the iPhone 7.