Yea I agree, just offering a solution. I am excited for Apple to switch to USB-C for the iPhone as well. It's quite irritating that it's not... one cable to rule them all! But then they went and added HDMI and SD back to the Mac, so now they have a better argument since they aren't actually doing the one-cable approach.
The problem is that I’d have to unplug that adapter to use my headphones with a device other than my phone, including other Apple devices like my Macbook. I would subsequently loose the adapter, guaranteed.
If the world could agree to use USB-C for everything, that might work, but Apple—who started this mess—is a prime holdout there.