In the early 2000 I ran into an outgrowth of patents that described all variations of the seamless replacement of humans in phone calls. Years later I got a telemarketing call where a young lady introduced her employer so enegetically and it was so beautifuly articulated that my alarm bells went off. (I know what it is like to crank out a thousand calls) I asked a question, and after a static click the same voice continued, only now she sounded like she lost the will to live. The patent art never covered that angle.

Since they didn't have llms it described pressing buttons to elaborately explain all angles of a product. The operator was to monitor multiple calls as text logs and jump in at the right time or if overwhelmed press the please hold + $excuses button.

The entire automation was designed to preserve the illusion of human contact. Selling stuff only made it to second place.