Electricity reached factories in 1882. Factory productivity didn't move for almost 40 years. The motor was never the bottleneck, and the same thing is happening to AI right now. Edison's Pearl Street station opened in New York in 1882. By 1899, electric motors powered less than 5% of machinery in American factories. A skeptic in 1900 could point at the dynamo and say it was everywhere except the productivity statistics. He'd have been right. The reason is the shape of the building. Steam…