What happened to Radio Shack is pretty sad. I get that the business simply wasn't going to sustain at that scale as consumer tech evolved, but RS caused their own decline way sooner than it should have happened. Becoming a high pressure cellphone retailer was a stupid idea, and I remember their selection not even being that good to begin with. And, like Kramer from Seinfeld said, Radio Shack really wanted your phone number for purchasing something as simple as batteries. Today, phone numbers are asked for all the time when purchasing something like groceries, but I remember Radio Shack being overly aggressive in getting your phone number. Meanwhile, their electronics component inventory kept dwindling.
At least with Fry's Electronics, they still had a lot of components on the shelf right until the very end, as ridiculously overpriced as they were, whereas Radio Shack seemed to dismiss its core audience.