What people, exactly? You could see the introduction of desktop computing and other types of computing in industry with a double digit increase to productivity, all other things being equal.
Any organization that properly adopted computers found out quickly how much they could improve productivity. The limiting factor was always understanding.
The trouble with AI tools is they don’t have this trajectory. You can be very versed on using them well, know all the best practices and where they apply and you get at best uneven gains. This is not the introduction of desktops 2.0