In the usual way hindsight is 20/20, the 3.5mm audio jack can be looked at as a workaround ... You’ll still be able to get wired headphones for when the wire matters. People who are paying ...

The 3.5mm headphone jack is an industry standard audio plug. Most commonly used for connecting a pair of stereo headphones to your smartphone or 'piping' your audio from your phone to an external ...

Those include the PCB and wiring, but not the microphone element itself. A 3.5mm audio jack is added to the flash case, and soldered to the microphone cable. Now he has a modular audio-in jack.