Exactly jimf, joined up thinking and long term planning wouldn't have replaced a perfectly good heliport with a supermarket. For anyone unfamiliar with the area, there is now a choice of three supermarkets on or adjacent to the heliport site, plus another new build about six miles up the road.
Regarding modernising the ferry link - that all seems to have gone quiet recently. There was a lot of controversy about the required alterations to Penzance harbour. The existing boat is nearly forty years old, so I'm guessing it will need replacing fairly soon.