Why not Rosie51? We talk about what will happen at our own funerals or what we want done when we go. Or we discuss our own parents deaths, how we will cope and what they have told us they wish to have done (or if not, what we envisage).
Why is the Queen so sacrosanct? From one angle, she is just a very elderly woman.
However, from my perspective, it is the effect on the country I was considering. We will feel her loss. Those rising up in power behind her are not her equal. The period of transition will be... challenging (if that is the right word?).