You've highlighted an important point: The long tail of old technology. If I recall, for some city in Europe, it was businesses running old vehicles that were c

You've highlighted an important point: The long tail of old technology. If I recall, for some city in Europe, it was businesses running old vehicles that were crying out for exceptions on the rules to ban the older diesel vehicles. The vehicles which are driving basically all day. Not great policy if they are granting all those exceptions.