Voice is the most dense form of communication? Maybe if AI does stt perfectly all the time, but then the reverse, tts is really not very efficient for me; I read far faster and can do a fast skim (taking milliseconds) to see if the answer is in there or reprompt instead of having to listen to the slow warbling of something/someone only to conclude it was worthless. Oh and tts, at least for me, is not perfect; it often gets things wrong making the other side return nonsense too.