Earlier quoted context omitted.
That's what you do. But what if you have several headphones? (I can barely realistically buy an extra adapter for my phone, never mind the ridiculous cost) I've got two headphones (good sound or active noise cancellation) that I use and every single day I have to keep extra track of the adapter to make sure that I didn't leave it with the other pair - that's even if I don't use it. I mostly use it for long calls but…
The headphone adapters from Apple and Google cost $9 dollars each. If you can afford to buy a $700 phone, you can afford to spend $30 bucks on some extra adapters if you want them. In most cases, at least. I suppose availability of the adapters might be an issue in some areas as well.
I need to literally spend $50 to be seriously inconvenienced because the manufacturer wanted to save $0.2 ?
Also, no. We still have some to wait before anyone produces a $700 phone worth the money.