I can see both as answers. Death is scary but you would be all alone is not great either. Organ failure is not good either. Mobility would be harder. lets be honest , you would be around the house mostly. You could not drive and would get tired walking going very far. You would probably be on a late show as a guest.
The Green Mile movie makes you think about it.
What is the age you would like to live to? Remember health field is always making improvements for a better life.