My maternal grandparents are currently 98 and 96 and the last time I visited them grandpa said that his father didn't live to age 60.

Meanwhile he has an older sister who, while bedridden, is very much alive at 100.

I suppose the necessary medical breakthroughs happened in the second half of the 20th century, as no one, including the people in question, anticipated they would live this long. Grandma even stated in her will that my second oldest cousin would inherit the apartment - supposedly to have "a better start in life when she grows up". That was 30 years ago and my cousin's oldest child should be in high school now right now.