I mean, wireless headphone by definition lack a wire which is a huge improvement to many people. Just because the improvement doesn't favor audio fidelity doesn

I mean, wireless headphone by definition lack a wire which is a huge improvement to many people. Just because the improvement doesn't favor audio fidelity doesn't mean it isn't an improvement. People have been buying external DAC's for years because they are higher quality than the ones inside phones and computers. Audio professionals don't use the soundcard in their computer - they buy an external one that probably uses USB, firewire, or thunderbolt. The headphone jack and DAC in a smartphone is convenient and often high enough quality for most people, but it is in no way a perfect solution. People who care a lot about audio quality in particular should not be sad to see it go, because they should be using USB or lightning already anyways.