Sal, you've been a very strong woman all these years...I am not near the 70s yet, but I also worry about these things.
iMO dr. k provided a service to those who didn't want to live life in bed. I don't understand how Stephen Hawking has lived as he has all of these years...especially watching my FIL deteriorate, and him wishing it was over.

I sit sometimes in awe wondering what keeps us going when we reach that level of disability. Time magazine is going to feature an article on how we die by Joe Klein. He discusses his father's passing and all of the issues involved with the quality of life vs. Fighting to lengthen it. Sounds like something to read & ponder...