Like Bags, I too find the modern reaction to someone of this age reaching the end of their life often unhelpful and slightly hysterical. We are all going to die at some point and the modern view that death should be fought against no matter the age or health of the individual concerned, troubles me.
Preserving a life - even of someone as magnificent as Nelson Mandella, must be balanced with how that is achieved and what his wishes are.
I know this subject is deeply personal but I can honestly say that I would be far happier knowing that my family would let me drift off gently if I lived this long than be subjected to a lot of medical intervention that would only postphone the inevitable, by probably a few months.