Summary: No one who has visited the classical vineyards of the Mosel, the Douro or Cote Rotie will ever forget the often dizzying experience of their steep slopes and tiny terraces – but these astonishing sites are also workplaces, too.  What are these vineyards like to work?  How profitable are they?  Is the younger generation ‘heroic enough’ to follow their forbears up the steep paths?  Should there be a ‘heroic