"When I first heard the stagnation hypothesis, I was skeptical. The arguments weren’t convincing to me. But as I studied the history of progress (and looked at the numbers), I slowly came around, and now I’m fairly convinced. So convinced, in fact, that I now seem to be more pessimistic about ending stagnation than some of its original proponents."

https://rootsofprogress.org/technological-stagnation

Note: Some tables in the original article have been omitted.