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

I’d disagree that most airline flights still have 2-pin audio jacks, as most aircraft have seats that have been upgraded to 1-pin stereo audio jacks. The 2-pin audio jacks were an upgrade from the two-hole jacks passengers attached sound tube headphones into.

https://apex.aero/articles/sound-tube-surprising-history-airline-headsets/