breezinup posted:Many Bluetooth-connected products exist that are relatively new, because Bluetooth technology is relatively new.
I wouldn't call Bluetooth "relatively new". It's been around longer than the Legacy control system.
Check out the history: Bluetooth History
And its roots stem even further back than what that page has listed. Bluetooth became pretty common in the very early part of the 2000's. I suspect cost and other technology developments (Smart Phones) is why it wasn't implemented earlier.