There is WHAT we say, but also HOW we say it that provides subtle secondary pregnant meaning like sarcasm, regret, or sadness.
We assume technology should be strictly robotic and unemotionally. But humans are emotional. And mastering the Technology-Human Interface was the key to Steve Job's success. Yes I smiled when I read some of the details of this fascinating essay. And who does not smile at a well written joke, pun or a word like 'spork'.
There is a 'ton' of meaning that is lost in empty words unattached to facial expressions and gestures. That is why we still have face-to-face meetings in the 21st Century