A similar hypothetical was in the classic book "Peopleware" from 1987, if I recall correctly, imaging the reaction if the phone was a new invention and the phon

A similar hypothetical was in the classic book "Peopleware" from 1987, if I recall correctly, imaging the reaction if the phone was a new invention and the phone company salesman wanted your company to put a phone on every engineer's desk which would allow anyone else in the world with a phone to at any time interrupt your engineers with no warning. They had an anecdote about one company they consulted at which illustrated how normalized interrupting engineers had become. The engineers were putting their phones on "do not disturb" (DND) to stop all the interruptions so they could get their work done, and management sent around a memo saying that the engineers needed to stop putting their phones on DND because that caused the calls to forward to the secretary, and all the calls were making it hard for the secretary to get any work done.