“I can’t remember why I stopped buying Campbell’s soup a few years ago. “
Most likely, the same reason a huge number of other consumers stopped buying canned goods. A century ago there were few alternatives to canned goods. Now, there are huge numbers of prepared foods that taste better than canned goods; frozen, freeze dried, vacuum packaged, fresh frozen...the list is nearly endless. Thus, consumption of soup, especially very salty soup, like Campbells, has plummeted.
Except for a few emergency cans here and there I had stopped buying at some point in the 90s because they dropped almost all of the flavors worth keeping. I didnt quit buying so much as they fired me as a customer.