I think the difference between self-driving cars and Apollo program&#x2F;subs examples is that the cars can be tested much more thoroughly. No matter how good your simulators are for space conditions, you&#x27;re never going to really know how it&#x27;s going to work in actual conditions. Self-driving cars can and are logging millions of miles in a variety of conditions, and every common and almost every remote case will be dealt with before launched to the general public.