Just wait until you’ve heard about the war crime that is Ohio Valley-style pizza
3 points
Chicago people can never believe that anything they have could possibly exist anywhere else, or, even worse, have pre-existed the Chicago version, which is usually exactly the same or slightly worse.
You can observe this in the wild; just start doing literally anything with a person from Chicago and at some point they will stop and mention “this is nice, but in Chicago we have…” and then go on to describe the same thing.