I guess I did translate &#x27;inefficient&#x27; to &#x27;impractical&#x27; in my head. I am not certain I see a large difference though. There are arguably many roads where getting a constantly updating map is relatively doable, and many where it is not. Even if the cars themselves are able to update the map, how will they handle the trailblazing through an inaccurately mapped area?<p>I also hesitate to trust the TED talk, to be honest. Even some of Google&#x27;s earliest videos of their self-driving car project seemed to portray a level of capability beyond what their cars could actually do without a lot of hand-holding.