> It’s enormously difficult to ship any interesting feature that integrates hardware and software.

Don't see how it relates to competition but it doesn't matter: Apple competitors should have the same access to the system as Apple does.

Also, don't be naive: this is about money and being able to sell airpods at insane margins by giving them unfair advantages that aren't given to com[etitors.

in some ways, are they not able to run their own apps on the iOS ecosystem to support extra features?

My sony headphones claim they do all kinds of magic stuff through the app, but I guess that's not a realtime feature, more like a regularly scheduled calibration