I've lost agemates to accident, to homicide, to suicide, and to disease. And I've lost people a lot older than I am to accident, to suicide, to disease, and to old age.

FWIW, I agree that having time to prepare is useful; unexpected death is harder in some ways to deal with than expected death. I've been a lot angrier about the suicides, but I haven't grieved them more. I've grieved the loss of young people more than the loss of old people.

All of this is very noisy generalization, since of course the specifics of my relationship to the person matter way more than any of that stuff.