Don't fool yourself, these people are amazing, but hey are outliers. While i understand that many people here aspire to be like this and you should, realistical

Don't fool yourself, these people are amazing, but hey are outliers. While i understand that many people here aspire to be like this and you should, realistically speaking these people have been very lucky. Most people 80+ either have trouble walking, hearing, seeing, thinking (or any combination combined). It's longer than the average lifespan, so that these people can still do their work in a meaningful way is a godsend. Sure, you can do a lot with a healthy lifestyle, but still there are limits to your genes, or life could take unexpected turns every second. My uncle, 62 years old, CEO of a bank, who was always healthy and fit just had a stroke and is now wheelchair bound and does not know which year it is. Meanwhile, his brother (my dad), has been smoking his whole life and not exercised for decades but is still fine. he probably won't get to 80 though, and he knows that.