That's true but the OP gave a mechanical example, too! :) On the other hand my out of loop observation is we're missing some tech revolution/discovery to make

That's true but the OP gave a mechanical example, too! :) On the other hand my out of loop observation is we're missing some tech revolution/discovery to make SDC possible because every single large car company and some big name tech companies are on the hunt and it feels like no one is close, though I have no concrete data on that, just watching the Waymo cars drive around my home.