Marc Andreessen: "Productivity growth is about to go through the roof." "Productivity growth for the last 50–60 years has been basically at historical lows... Fundamentally, I think it's because we decided other things are more important." "We decided we didn't want nuclear power. We decided we didn't want a space program. We decided we didn't want cars that went faster than 55." "What we got in the last 50 years was hyper-acceleration in very specifically—chips and software. And then…