Bluetooth 5 added audio for BLE called LE Audio with LC3 codec. BLE has higher (24 Mbps vs 1 Mbps) bandwidth than Bluetooth Classic. Bluetooth 5 headphones are available now.
That would have been perfect time to update headsets. It sounds like A2DP can do backchannel now and there is Qualcomm proposed FastStream. But it isn't implemented widely and probably won't be until standardized.
That would have been perfect time to update headsets. It sounds like A2DP can do backchannel now and there is Qualcomm proposed FastStream. But it isn't implemented widely and probably won't be until standardized.