There has been speculation for a long time that after Elizabeth died, that she might be the end of the monarchy. Obviously, that wouldn't be immediate, but Charles is not as well liked and given his age, is never going to be a long ruler offering the stability and nostalgia that she does.

The concept of a small segment of people being better is antithetical to modern values, so it was only a matter of time.

I don't think it will be immediate, especially given the turmoil of change around brexit and covid. Some stability will be desired, but there will be a constant slow drip loss of support until it's abolished or radically diminished.