A future where humans are no longer able to drive will have to be a decade or more after self driving arrives. It’s impossible for everyone to replace their non self driving cars immediately.

The used car market is a $150bn industry. A quick spot check found that a 2010 Honda Civic still costs between $5k and $10k depending on mileage, etc.

By the time that self driving is required by the NHSA or whatever body requires backup cameras and the like in new cars self driving will be standard.

A $20k Subaru will come with it out of the box, no add ons, just like a backup camera today.