My GP told me once that if I carried on like I was, ie: drinking, eating too much junk food etc, that I would end up gaga in a care home.
I told him that was exactly what I was trying to avoid and that was why I drink too much, eat junk food etc...
I still drive the Out of Hours GP's around at the weekend and most of the patients are elderly and in care homes. It's all very well keeping people alive longer but many have dementia and no quality of life and if there is no DNR in place, if anything happens, they will be kept alive at all costs.

If it was up to me they would just get a nice overdose injection of morphine and slip quietly away...

And yes, I know that I only get to see the bad cases and that many older people are compos mentis, but...