Cars make themselves not-fast by their sheer inefficiency unless huge amounts of taxpayer money is continually poured to the infrastructure. What’s incredible is that cars have been getting even larger, an example of astonishingly perverse incentive structures.

From my experience in the third world with quite poor infrastructure (e.g. unpaved roads, lack of traffic control devices anyone respects etc.), cars and motorcycles are still everywhere.

Some places like Ethiopia have simply switched to EVs by encouraging their import and discouraging import of non-EVs. Now, most vehicles there are EVs.