Yeah. Relatively healthy, active for age, most of your marbles still rolling  freely - gone. That's unexpected.
That's what I want, too.
Expected. Cancer, Parkinson's, MND, strokes, heart conditions, a whole bunch of deteriorations that make your life miserable, regardless of age.
I know  a man who is about 98. Plays bridge, plays table tennis, still drives. If he went in  the next  week that would be unexpected.
Sorry to hear about both Patricia Routledge and John Lodge but we have to get used to such news.