Have you ever tried to make an international transfer through a French bank? Neanderthals Age.  It will be very difficult to beat London´s financial services. Macron will have to deal with unions and after that with a strong regulatory culture inserted in France.

David Fuller's view

You make a very important point.  I have enjoyed many trips to France with family and friends, and was fortunately able to cover all transactions with a credit card or occasionally cash.  However, financial services are another matter and I think you are correct.