I get to St Naz usually once a year now for family reasons, they're doing a cracking job of regenerating the whole place, blending leisure facilities alongside the dock workings and the old submarine pens. The docks are thriving and that prosperity has spread across the whole town. It's much like Hull could, or might, be except it's a bit smaller so easier (cheaper) to do wholesale renovations, having a succession of socialist mayors helps too...
Yes I went to Mont St Michel many years ago and yes it was fantastic. Went in 2023 and it was dreadful, victim of it's own success. They've built car parks about an hour's walk from the site, or you get a shuttle bus, costs a fortune and it's absolutely heaving with visitors. Thoroughly **** experience.