Not to mention it’s a form factor that requires a considerable amount of space. That for the majority of users is doing nothing but taking up that space for no reason. Every phone without a headphone jack is capable of getting a jack with a simple dongle. What I love are the people who have absolute no problem with a dangly cord around their neck but lose their shit if you have to connect a 1 inch piece of wire first. They act like it’s a bag phone you attach to your side. And as far as audio fidelity goes the DAC inside a cell phone is nearly always garbage and you’ll need your own DAC anyway which is easy to obtain when it can be powered by your phone.