My grandmother made it to 94; she was in excellent health until the last 3 years or so. After grandpa died, dementia bloomed fast. I also had a great-grandmother who lived to be 92; again, she was very healthy and living on her own in her own house until having a stroke. She went from the hospital to a nursing home, and died just a couple months later. The pattern in my family seems to be that if you make it to 70, you'll make it to 90ish...