That's a neat story Scott. My grandfather is still alive at 82, but he has a deteriorating heart so doesn't have many years left. He was in the VA hospital a few weeks ago so I went and visited with him. As I was walking in, I saw a sign out front that said "The Price Of Freedom Is Visible Here".
It really hit home then. He fought in WW2 in France, was shot a few times, came home, had a healthy family, a successful business etc. I have been very fortunate that I haven't lost anyone close to me yet, but I know that luck won't last long.
So yes, spend time with your older relatives because you really will regret it if you don't.