Betting against techno-unemployment

There are millions of truck drivers in the US today. In particular, there are about 1.7 million tractor-trailer (human) drivers. There are many more professional truck drivers in the US, but tractor-trailer drivers are the "archetypal truck drivers". In 2016, we had several demonstrations of self-driving tractor-trailer trucks. A self-driving tractor-trailer truck delivered beer for Uber in October. Putting two and two together, many people are worried that we are soon going to face a wave of technology-related unemployment.