I have not met anyone who has said “My boss regularly allows me to leave work at midday because AI helps me finish my work in half the time.”
Much like smart phones and the pc itself, the benefactor of the productivity gain from any new technology is the business owner. Not the worker. Workers simply get to cram 10x more tasks into the same unrelenting, frantic pursuit of “profit” that they always do. For an increasingly smaller share of the gains.