Kinda mindblowing:
So the slowdown in productivity growth from 2007-2019 refers to a growth rate of about 1.5% a year. From 1945-1973 it was around 2.8%.
But like, 1.5% a year still means that in a single generation, an hour of work produces 45% more stuff! In 50 years it's more than double the stuff.
2.8% *is* much faster (double per generation) but still! By historical standards, 1.5% is zany fast.
Put another way, if a person is born today, and the "slow" rate holds for 75 years, when they are 75, a single hour of labor is triple the output of when they were born.