Comment by mcny
I can't think of a way to have dozens of smaller car companies, all competitive and all viable long term without ongoing and adaptive regulation.
With Chevron doctrine dead and Congress struggling to pass a budget, I can't see how it is possible to have any meaningful regulation in the US in the short to mid term.
Even the mainland China model of pitting province and local governments against each other to foster competition might not work in the long term (it is still early days). We already see specialization in provinces which to me indicates that there is a defacto province government who wins auto manufacturers in the long run.