I'm really curious how quickly we would have huge numbers of L5 SDV if we societally accepted ~equal rates of injury and death, both of passengers and pedestrians. I want to be very clear, I'm not advocating for this (and even if I was, I haven't the faintest idea how one would go about getting society more broadly to go along), but part of me thinks that the primary hold up isn't actually capacity but instead standards.

This doesn't really argue against your point, because the standards are what they are, and like I said, I have no idea how one would go about changing them if one even decided they wanted to. And given what they are, it has taken, as you point out, enormous amounts of effort to reach those standards in a practical way.

That all being said, while I agree that SDV's are in many respects easier than other robotics tasks, they are also somewhat uniquely dangerous. Other categories of task, while potentially more complicated, won't have to worry nearly so much about safety, and so may be operating under a different constraint regime. I think this means that we may see adoption happen at a much more accelerated rate than we have seen in the automotive space.