1. Digital audio means DRM audio :Restricting audio output to a purely digital connection means that music publishers and streaming companies can start to insist on digital copyright enforcement mechanisms. We moved our video systems to HDMI and got HDCP, remember? Copyright enforcement technology never stops piracy and always hurts the people who most rely on legal fair use, but you can bet the music industry is going to start cracking down on "unauthorized" playback and recording devices anyway.2. Wireless headphones and speakers are fine, not great.
3. Dongles are stupid, especially when they require other dongles.
4. Ditching a deeply established standard will disproportionately impact accessibility.:The headphone jack might be less good on some metrics than Lightning or USB-C audio, but it is spectacularly better than anything else in the world at being accessible, enabling, open, and democratizing. A change that will cost every iPhone user at least $29 extra for a dongle (or more for new headphones) is not a change designed to benefit everyone.5. Making Android and iPhone headphones incompatible is incredibly arrogant and stupid.
6. No one is asking for this.