eli5: Why do most airlines still use 2-pin audio jacks for the in-flight entertainment systems on their planes?

Question

eli5: Why do most airlines still use 2-pin audio jacks for the in-flight entertainment systems on their planes?

In: 600

Answer 1

well you see, back in roman times the width of two horses on a chariot created ruts in the road. then trains were invented to run in those roads. then they built the space shuttle to fit on a train. So the audio jacks need 2 pins on planes because of two horeses asses.