1. “Diffusion lag” reflects a lack of product-market fit. Even AI optimists are still hitting practical roadblocks. That’s why detailed case studies are so much fun: physics, code security, running a restaurant at a small independent hotel.

Better-educated, higher-paid workers will be the next to be impacted. A new study by the Brookings Institute (Muro, Winton, and Maxim, 2019) projects that high-skilled professionals like radiologists, legal professionals, optometrists, sales professionals, management analysts, computer programmers, and many others may be the most impacted by new te