[sebastien_bois]

Yeah, but how long did it take to truly drop to the $5 mark? When bluetooth stuff came out (mice, keyboards, etc.) they were exorbitantly expensive. It was way cheaper for manufacturers to sell stuff with their own RF dongles instead of using BT.

[Exmoor]

I recall buying a USB Bluetooth adapter in the mid 2000's that was maybe $12 shipped from Asia. If that was a the cost to the consumer for a device that was mostly a bluetooth radio I suspect that the cost to add bluetooth to a high volume product was probably at or below $5 ~15 years ago.