You must lead a sheltered life. Pain and quality of life are the overriding factors. They could put terminal cancer or heart patients on machines and keep them alive forever, but they don't. Any technology or medicine which delivers the patient from pain and restores quality of life will become affordable solely on the basis of the supply being cranked up to meet the demand. Whenever a "silver bullet" medical technology is invented, it soon becomes routine and affordable.
I hope it stays sheltered. To tell you the truth, I'd rather get hit by a bus than croak in a hospital bed after six months of being hooked up to some machine.
When I die, I want to go peacefully in my sleep like Grandfather did. Not screaming like the passengers in his car.