If you're a fan of some of Campbell's Soups more out-of-the-ordinary varieties (such as Chicken Gumbo, Scotch Broth, and Pepper Pot) the photo at right will go a long way towards explaining why you can't find your favorites any more.
Fourteen spaces on that display are devoted to varieties of chicken noodle soup marketed directly to children. All of them are based on the same cheap and kind of nasty chicken broth and the only difference between them is the shape of the noodles. But because they are extremely inexpensive to produce and kids are highly susceptible to advertising, Campbell's has found them to be highly profitable.
Years ago, Campbell's outsourced the production of some costly soups to their Canadian division. Scotch Broth and Pepper Pot were two examples. But they began getting scarce in New England markets late last summer, until finally they became completely unavailable.
For now, Pepper Pot and Scotch Broth are still in production in Canada and available in supermarkets there. I don't know what happened to Chicken Gumbo.