

I’m not sure that they ever had any data because the data would probably suggest that management had the lowest productivity out of any employee. Middle management is filled with too many meetings, they’re all promoted to a level of incompetency, and have delusions that they contribute more towards the success of the business than the skilled people below them.
The article by Wait But Why has always been my favourite reference guide for explaining the future of AI to friends and family: https://waitbutwhy.com/2015/01/artificial-intelligence-revolution-1.html