wirelessfoobar
Re:Bluetooth 5 will quadruple the range, double the speed
on Tuesday June 28, 2016 @03:21AM (#11992032)
Phone manufacturers universally adopted Bluetooth as the standard wireless protocol for peripheral devices.
Zigbee and other 802.15.4 protocols will always be at a disadvantage even for tasks the Bluetooth protocol is not suited for. Bluetooth chips are cheap and more widely supported than anything else because Bluetooth radios are manufactured at massive scale for the phone market.