Re: Even in the extremely unlikely event that fully autonomous vehicles ever become viable
"Not very viable, politically speaking."
To say nothing about the fact that there are, by some estimates, some 50,000,000 vehicles on US roads that are over 40 years old. These aren't old junkers, these are carefully maintained family heirlooms. They are driven daily, both for utility and for fun. Outlawing all these vehicles would alienate a LOT of voters.
Manually driven over-the-road vehicles will be with us for at least another century, and very probably much longer. I suspect that any politician who tries to change this will be tarred & feathered and run out of town on the rail.
