It only works if there are headphones attached, which confuses users. Plus, Google or another company has to pay an engineer to write an app for it, and test i

It only works if there are headphones attached, which confuses users. Plus, Google or another company has to pay an engineer to write an app for it, and test it against the hardware in the phones, etc. etc. Usually this functionality is a byproduct of some random other chip on the phone that is multifunction, usually Bluetooth. So people who don't use Bluetooth get confused/upset/paranoid/tin foil hat when their FM Radio app tells them that Bluetooth needs to be enabled to use it. Many users who really want FM can already do it today, but it involves rooting their phone and installing something like Cyanogenmod.