I have wondered whether it isn't the commoners who live under the monarchy and accept their place in it, as a source of pride for all things British Empire. My SO who lived in London for few months was baffled by the constraints of a true class system. All this changes with the advent of Empire invading the UK to remake the rules and memory of history. Charles may be such a cock-up that it will all end with a whimper.
Charles is only 22 1/2 years younger than Elizabeth, so there is a good chance his reign will be short. William otoh is 33 1/2 years younger than Charles.