We don't really know yet what state of the art is for autonomous vehicles. Until we have gathered a bit more data from different companies we can't say anything

We don't really know yet what state of the art is for autonomous vehicles. Until we have gathered a bit more data from different companies we can't say anything. This accident might have been a fluke, it might have been caused by bad engineering, it might have been caused by many things. We can only compare once we have a sizeable sample of incidents, or a long enough time of non-incidents that we're confident the system works well. And every software update could change something about it.