Technically Lightning connectors can do this too - they're able to support the legacy audio out from the 30 pin connector. I assume any lighting to audio jack adapter would be utilising the phones DAC and passing analog audio down the lightning connector to the audio jack.
People's next moan is they'll lose the adapters, but really? Just leave your headphones connected to it, headphone jacks don't tend to pop off easily, you've just got a couple of inches extra wire on the end of your headphone cable now, thats literally the only change that'll happen for wired headphone use!