Aldi's was started by two German brothers right after WW2, when German lay in ruins and they had to get the products out to the ppl somehow. The idea was NOT to stock it with, for example 20 different cans of tomato sauce, but only one or two. Same with every other product. They are big over in Germany still.

In a way it's kind of fun discovering how to live cheaply with thrift stores and Aldi.