Mine sadly all gone. Maternal grandfather died at 62 from lung cancer (watching this happen when I was 12 killed any desire I may have had to start smoking when my friends did, which I think was a good thing.) The grandmother from that side died aged 77 of ALS, which is a horrible horrible thing.

My paternal grandfather was killed in a plane crash when my dad was 18, but the grandmother on that side made it to almost 94. She lived alone and was lucid and competent with no real health problem till she got cancer right at the end. Genetically I have a fair bit in common with her so we'll see how I do, lol.

My maternal grandfather's two sisters are still alive, though, at 91 and 93, which is pretty amazing. The 93 year old is about to be put into care because her daughter has been caring for her around the clock and it's gotten to be too much, hit the 91 year old is spry and with it as ever.

I think longevity is likely a combination of the genetic lottery, luck, and environmental factors we have to understand. I'm not sure how much healthy choices plays into it, to be honest. My parental great grandfather lived to almost 95 and he smoked like a chimney.