"want to buy" is a pretty nebulous and person thing. It doesn't seem meaningful to talk about without fully qualifying much less say "it's not possible". We can move the goalposts all we want but those sorts of cars are imminent for at least early adopters. If you want to say you won't feel comfortable for another 10 years, great, but that doesn't mean the event hasn't happened. It's a tremendous accomplishment. I've seen the fully autonomous cars making lefts on El Camino that I just would not do, ever, and they do it perfectly.