Every once in awhile the stars align and I randomly get an "HD" voice call. It's disorienting to both me and the other party how good the quality is.
https://www.microsoft.com/en-us/microsoft-365/business-insig...
They really do sound alot better. It always reminds me of the first time I ever made a FaceTime call, in 2010, and the high quality audio was just as interesting as the video.