In 1973, four years before he disappeared down the Star Wars rabbit hole, George Lucas directed the film American Graffiti, eulogising his days as a teenage car fanatic in Modesto, California; parking at drive-ins, hot-rodding and cruising for dates. This vanished world was only a decade away —‘Where were you in 62?’ said thepublicity — the equivalent of someone today getting dewy-eyed about 2007.