A lot of those will disappear if my anecdotal observations are anything close to being the norm.
The story goes like this in a lot of cases...
Owner's plan was to pass the torch to someone younger in the family and then rely on that younger person to be their retirement plan OR sell the business for enough money that the proceeds become the retirement funds.
Unfortunately, nobody in the family is interested in taking over and no sane person is willing to buy a doomed business for obscene amounts of money required for a comfortable retirement. Owner(s) work until they can't anymore, but by that point they've run the business into the ground, so it just closes or the land/building/assets are purchased for a depressingly small amount of what it might've been worth at its prime only for nothing to ever come of it.
What I call my home town -- the down town area is a literal ghost town of the skeletons of this exact scenario. My hobbies? The first class vendors of 10 - 15 years ago or longer are pretty much all dead and gone, their stock having moved hands to new vendors who literally squandered it all.