Lots of reasons, but probably the main reason that Bluetooth (BLE anyway) has exploded is that Apple supported it and that drove adoption. Once you have a major

Lots of reasons, but probably the main reason that Bluetooth (BLE anyway) has exploded is that Apple supported it and that drove adoption. Once you have a major platform adopting it and devs follow and build out SDK's, examples of usage, etc, then it becomes easier and easier for everyone else to jump on the bandwagon.