Let me give you an analogy. Say we are on Earth looking up and we see the moon. We decide we want to go visit. Every day we add a couple of stones to a large pile on top of a mountain (those are the edge cases). We are provably getting closer to the moon every day. But we will not get there because we need better technology, we don't need piles of stones, we need a rocket.

In your view we are within striking distance of the moon, another couple of piles of stones and we are there. In my view, I'm not sure that it will just take more stones and not a better technology, and I'm beginning to lean more and more towards the latter because the problems that we were seeing 10 years ago we are still seeing today: more and more edge cases. And edge cases can be a symptom of a problem that is almost solved or it can be a symptom of a problem that is being solved using the wrong toolset, especially when there are lots of them and new ones keep popping up all the time.

Clear now?

And by the way: none of this is to imply that what has been done isn't impressive, the MB statement that they will accept liability if their software is in control of the vehicle is a step in the right direction and shows a lot of confidence. But it's incremental progress towards a goal that might not be reachable in that way.