I don't find it very cheering to think that I'd only be discovered dead in my home because someone got angry that they couldn't fit any more mail in my mailbox, and complained to their manager about it. (Or because someone got grossed out by the scent of decay coming from my apartment, or because I never paid my bills and the repossessors attempted to visit me, etc.)
It's quite different in kind from even the most casual positive memory, e.g. a barista who makes note of the fact that a customer who they used to see every day at 3PM, isn't coming in any more.
So yes, the county police noticed at once that the man was dead, the employer almost at once that the man was missing or at least incommunicado; but putting the information together was the problem.
It was a shock to me, some years ago, on leaving an office job to start a new business: I had a group of what I considered good friends, we spoke on many topics, shared lunches nearly every day, went out socially on occasions. Not one of them dropped in to my new work to see how I was getting on [the reverse was impossible, it was a closed site].
They noticed I wasn't there, but it clearly made no substantial difference to them.
Very few of us will leave a legacy that impacts beyond immediate family and friends, I think for those of us in that boat we have to come to terms with it and not let that thought cloud our enjoyment of the time we do have.
With 8 billion people the memory of good deeds quickly gets lost in the melee of daily life.
Once the current generation gets old we could easily coast through life isolated without friends. We’ll all need dead man switches soon.
https://www.foxnews.com/story/womans-dead-body-lies-in-flat-...
Decades ago I knew someone nearly homeless living in a downtown Chicago dive hotel, the kind of place you turned the bathroom light on just so the roaches would scatter before walking to the toilet.
They talked about the hotel management giving the younger and destitute tenants free months of stay in return for getting rid of the bodies and possessions of elderly tenants when they passed away.
Apparently it was somewhat common for poor elderly folks, alone in the world, to move into the hotel and have their government aid checks cashed for them by the hotel management.
By making them disappear after dying, the hotel continued to (illegally) collect the checks.
https://www.cnn.com/2014/03/07/us/michigan-mummified-body-fo...
Truly macabre.
Well, how about this one? They noticed it after 5 months:
https://www.dailymail.co.uk/news/article-2515097/Oxfordshire...
A woman's skeleton was discovered in her flat three years after she is believed to have died, it emerged today.
https://www.telegraph.co.uk/expat/expatfeedback/4199730/Skel...
Not to mention tons of people have been found after weeks or months being dead without anybody noticing, so "the mailperson will notice eventually" is hardly a comfort.