It also used to be about retaining mobility once you get old.<p>When you can&#x27;t run around outside for more than a few minutes and can&#x27;t ride a bike any more, a car becomes you sole connection to the physical world.<p>Today, I&#x27;d say it is more of a bet: &quot;How certain am I that the 100% self-driving car revolution (as in: needs no license) will reach the place I live in before I get old?&quot;