91 years of healthy, vigorous life is an incredible blessing and, I would guess, a long life by any standard.
You’re right. He was ready to move on and he did so on his own terms. For me, I was just really hoping to introduce him in physical person to my new son at least once, and was in the process of making arrangements to do so. Unfortunately, it took longer than expected to get my son’s passport.
Thank you for your condolences.