Yes, so 80% of 100 hours is considerably less than 80% of 600 hours
This is in-line with Googles study showing about a 10% productivity increase and other research I’ve read. I suspect this will increase with more integrations and workflow adaptations.
But even after power tools changed how quickly carpenters can frame and rough-in a house, the finishing work (which uses power tools too) still takes the majority of the time.