It is so true, you really just never know. I think that is why you have to live life while you have it and not just spend your days being curmudgeonly and bitter!
I think as you get older you start to get a sense of your own mortality more as well and it shakes the pants off ye and not in a good way
My mortality is certainly closer in my thoughts as I've gotten older. It helps me talk myself out of a lot of nonsense for sure. I think sometimes, what am I spending my little time concerned about THAT for ?! (whatever THAT is at the time)... and I try to get myself turned in a better direction.... for whatever little time I might have left. ha ha.... but not in a morbid way, in a fun way that lets me leave it behind.
I am the same, it has helped me not go full crazy on nights out with the guys and sometimes I have even got home early-ish... Not too early though, I've not gone full wuss.
I do find myself thinking about things and telling myself to give myself a break. Lol, the madness of the mature years 😀😀