Don’t get me wrong. Apple removing audio jack was the biggest facepalm in smartphone history. And you can thank it for not being able to make an upgrade without sacrificing audio jack (and SD card too :/). But USB-C is getting standardized everywhere now (laptops, smartphones, etc.). What makes USB-C earphones not worth the switch?
Gaming.
Games typically need low latency audio, so Bluetooth is out. Games can also burn through battery, so you want to plug in after a while.
And how many games that require perfect audio latency did you play on your phone in the last weeks?
I play a fair bit of Bullet Echo. Having 100+ ms of latency with Bluetooth headphones is a pain. It burns through my battery pretty quickly, so I often end up plugging in my phone.
It isn’t a big deal - but being able to charge and headphone would be nice.