I’ve thought about this a lot recently. My grandfather had a massive heart attack and dropped dead shoveling snow at age 44. My mother was 14 at the time, the oldest of 5 kids. He was a Liberator pilot in the Pacific during WWII survived being shot down twice, earning the Distinguished Flying Cross.
I just turned 44. I have 3 sons under 10. I’m also a military pilot and my health has been vigorously monitored over the years via annual flight physicals. That pesky family history still worries me. Enough so that as unpleasant as it was to do my wife and I have wills and complete estate planning done. Just necessary fault stuff to do.
Sorry for your loss.
It sounds like you are better prepared than most. Might I encourage you to have the same discussion with your parents or wife’s parents as well. If for no other reason than to make your life easier when they pass.