There's a simpler change than just banning: Start now, with all vehicles priced at over $150,000, and reduce that threshold by $10,000 each year. This forces t

There's a simpler change than just banning: Start now, with all vehicles priced at over $150,000, and reduce that threshold by $10,000 each year. This forces the tech to be implemented in the biggest and most profitable vehicles, before filtering down to the mass market and eventually the bargain segments.