I talked to a heart surgeon in his late 50s about 10 years ago. "Who knows, we'll all probably live to 100!" I said, lightheartedly (don't remember the exact co

I talked to a heart surgeon in his late 50s about 10 years ago. "Who knows, we'll all probably live to 100!" I said, lightheartedly (don't remember the exact context). "No", he said, "my generation might, yours is too unfit, too young, to live that long".