I remember a story I heard about Microcenter. It was started in my hometown (Columbus, OH) by a Radio Shack store manager. When PCs were coming out, the store manager kept putting those PCs up at the front of the store. The district manager would come back and make him put it in the back. This went on for a bit until the store manager quit, took his best sales guy, and opened up Microcenter at the mall next door, selling PCs. They eventually took over the entire mall, before moving to another part of town, and then expanding to other towns. By the time Radio Shack figured out where things were going, things were too late.

I didn't know this years later, watching Young Sheldon ... that Incredible Universe was Tandy's attempt to get into the consumer electronics when Radio Shack's profit started falling, and that Tandy has a whole (very profitable) leather company. My SCA friends tend to know a lot more about Tandy Leather than they do about Radio Shack.

Fry's Electronics closed here in the west part of Phoenix, several years ago. Their shelves were starting to get bare and were selling things from consignment. It took a while for them to die, and I finally found out why: they were having trouble getting credit to buy inventory.