I come from a long-lived bunch. I think that the youngest to die amongst my parents and their brothers and sisters (7 in all) was 86. One reached 100, one is still going at 96.
I had a brother who died at 18 of muscular dystrophy. Apart from him, all of my other 4 siblings are still going pretty well. We are all on tablets of one sort or another. I'm the youngest at 66.
None of the above have abused their bodies with calories and alcohol to the extent that I have. I have two separate heart conditions, both of which should respond well provided I can keep down the things that I seem to enjoy. I enjoy a lot of stuff apart from booze and food, and in general I think I'm a very lucky chap.
I have no great desire to be around to witness the collapse of civilisation which I am convinced is not that far off. On the other hand, so many people depend on me for lots of stuff, not least my dear wife, I don't want to shuffle off this mortal coil and leave them to their fates.
Not that there's a lot I can do about it.