This is too bad.
But having known my share of 84 year old men living by themselves, it is possible he was not friendly or approachable. There are a few of them in the neighborhood. I keep my distance and make sure their pathways are shoveled.
I guess if I saw that the house showed no movement, I would not be inclined to “go into” the home.
Surviving two wars can indicate that you are steadfast and wiley. It does not mean you are friendly or smart.
That said, no one should die alone.
<serious bravo>
That’s when you find some of his cranky old friends or acquaintances to look in or the sheriff or firefighters. They are trained to handle situations like this.
Maybe that's the way he wanted it. Alone with his demons ...