I hear they are a solution to the problem of increasing mileage/efficiency. I am no fan of Tesla, but we have to admit, there is some merit to that argument, however debatable the efficiency benefits are.

That’s not to say safety isn’t a serious issue. The biggest problem is the reliance on electronics. Now if someone can reinvent the design with a highly reliable mechanical system, with multiple redundancy.

Define “never”. Never in as in never in the history of 21st century America? Pretty tame assertion. Never in the anthropological sense? That would be completely farcical.