That article links to a source written in 2018 which says “Bluetooth 5.0, which has already been announced, offers much higher bandwidth. This should let future Bluetooth headsets play back audio at high quality while the microphone is being used, in theory.”
I don’t know if it does make a difference, but hopefully Bluetooth 5 is more capable.
sorry buddy audio is still capped for bandwidth so no hifi for audio steaming in Bluetooth 5.0. LDAC by Sony has been available since BT 2.0 EDR allowed for nearly 1000kbps but there is still overhead and approaching that bitrate leaves out the ability to take adavantage I’d distance and error correction with interference.