I've read that they might make the coronation a more modest affair then the queen's was, and I do see the reasoning. One one hand it would be bad optics to have the new king riding round in a golden carriage while people can't afford the heating.
But that got me thinking, they already have all the fine clothes, furs, jewelry etc anyway, it's not like they can take them down to cash converters if they don't use them. We're probably already paying for all that stuff to be stored and maintained as historical/ cultural artifacts, so they might as well use it.