Comment by wat10000

The source is the fact that very few phones have them.

There isn't some grand conspiracy to keep headphone jacks out of phones. Why would they do that? You think Samsung or Google wouldn't jump at the chance to sell more phones by putting in a headphone jack, if that would actually help them compete? No, the reason few phones have one is because few people care about it, at least enough to influence their purchasing decisions.

There are plenty of examples of market failures in the world where lack of competition or information prevents consumer preferences from being reflected in product offerings. But smartphone hardware is definitely not one of them.