This reminds me of when DWiffey told me when I first met her grandfather on her dads side that "He's been 'dying' for years!".
He lived well beyond that and died at age 89.
My pop is 83, and since we was replumbed, he lost a bunch of weight and is doing awesome.
I know there is no way of knowing when our demise will be, whether it's a health issue, or being hit by a truck, but, I don't find it useful to dwell on it...we can take precautions in certain ways, but, yep, we're all gone at some point.
But, I'm also not as "old" as you...yet...!