Macron's strength - and Le Pen's weakness - in the North West of France is very interesting imo. Shows the ways in which Macron is the most 'traditional right' of all the candidates.
Or demographic change - the North West has secularised dramatically; and Rennes and Nantes are almost the two most obvious examples of socially liberal, prosperous, bobo cities in the country.
Although the region has always been politically moderate, a friendly country for centrists.
Ah, but if the North West had become like the rest of France then it wouldn't stand out in elections.