Walled garden? Ha! All bluetooth devices do this on all platforms when you use both sound + microphone. It has to split the available bandwidth between the two

Walled garden? Ha! All bluetooth devices do this on all platforms when you use both sound + microphone. It has to split the available bandwidth between the two. My Sony headphones will go into "headset mode" on Windows and Mac and sounds horrible in both, just have to make sure no programs are trying to use the headphones' microphone and then you get full bandwidth for audio.