>L5 is impossible by this definition ...
I 100% agree. There's no way AI will be able to solve this without being sentient. In my area, there is a large network of single lane dirt and gravel roads that people rely on for their daily existence. I'll be damn impressed when AI can figure out handling an oncoming truck and figure out when to pull forward to a wider spot, backup, stay put, where and how far to pull off into ditches or shoulders that won't give way or lead you to get stuck in the mud or ditch, and when to know if they can push the vegetation out of the way or not. And when to trust a cliff-side "shoulder" or not. These aren't rare exceptions either, that's daily existence for these people. And if you think the paved roads in the area are much better, you're gonna have a rough time.
>People who think otherwise must have spent their entire lives in metro areas with little to no weather.
Despite the slight hyperbole, I think this is absolutely correct. I see this very problem with many takes on this site in a wide variety of contexts. The same people have zero problem advocating for regulation without any exceptions that applies to contexts they simply have never thought about.
At the risk of full-on ranting: They then complain when rural people object and do their best to invalidate the objections of rural people and insist they have the moral high ground.