Even if you don’t want to make it, I’ve never been in a supermarket that doesn’t offer a fresher option. I’ve even been in gas stations that offer what they at least claim is fresh potato salad.
Maybe if you really, really wanted potato salad and you were in a food desert but the corner 7-11 has canned potato salad you might buy it, but I’ve never seen this before in my life.
I don’t get it.
That does seem gross and weird.
I will note that this is German potato salad, which does not have mayo and instead has vinegar, so it’s not quite as disgusting as I first thought.
Still, the only use cases I can think of would be camping and end of world prepping.