If you think about it, there is a lot of software that hasn’t been built across hundreds of industries because our best paid designers and engineers were occupied with building social networks and ad networks.

"The best minds of my generation are thinking about how to make people click ads." — Jeff Hammerbacher

Meanwhile, massive parts of the physical economy were and still are running on spreadsheets, email, paper forms, ancient desktop software and enterprise systems installed sometime around 1999 by companies who couldn't care less. And most companies still use that exact software, even today, for various reasons.

Construction. Manufacturing. Logistics. Agriculture. Waste management. Energy. Shipping. Maintenance. Laboratories. Local government. Field services. Industrial equipment. Healthcare administration. The list is endless.