As one who has worked since 1988 in LTC skilling nursing facilities, I don't think any of us really knows how we would feel when it comes right down to it. I have seen people whose "quality of life" is abominable, but their will to live is incredibly strong. (I do think a living will is a good idea, also a health directive should be in force as well.)
Carolyn
Have seen it happen in my family and have seen the toll is takes on the loved ones.
Allow me my personal choice.