V.35 or IEEE-488
Some people just want to watch the world burn.
One of those big old audio jacks. Bonus points for use of metal and leaving a good chunk of it ‘sticking out’.
Remember parallel connection? You know, that giant ass VGA lookalike that worked like a slower version of USB? Let’s make a connector sleeve that looks like that, surely it’s not a terrible idea at all even if your phone has a headphone jack (it blocks the headphone jack from being used due to its size).
Hey, I’d buy it. Maybe, I mean money is pretty tight.