Appreciate the testimony of the importance to keep working. The allure is very strong to sit around and “relax”. Sounds like your Pops overcame that. And the realization is that eventually everyone goes and no one gets out alive.
When Dad filed for SS at 62 someone asked him if he was going to retire now and take it easy. He answered by opening up yet another truck tire wholesale/retail/repair business and doubling his own physical demands... Even at 80 he could physically out work all the young guys he had working for him. And he made it look smooth and easy with a flow, almost physically effortless. He sure made it pretty hard to follow his example. :)