VW has been providing the turbo Diesel small car technology in the US for the last ~20 years that the domestics claim the peeps don’t want.
more to it than that.
fedgov got involved in dealing with small car diesels b/c too many would siphon off too much diesel that truckers use. you don’ t put ethanol in diesel. lots of interests have quashed any move to commonplace large numbers of commuter diesel vehicles.
otherwise it’d be fantastic.