It's quite impressive that Radio Shack have kept going as long as they have. Here's the Onion's take
http://www.theonion.com/articles/even-ceo-cant-figure-out-ho...
http://www.theonion.com/articles/even-ceo-cant-figure-out-ho...
When you needed an RS-232 cable or a box of floppy discs, sometimes Radio Shack was all you had.
It's easy to toss rocks at them today. But it's hard to understate their importance to the early PC industry.
Ultimately Jobs was right. This sort of hobbyist market wasn't going to last (and RadioShack has completely missed the boat on the 3d printing and "maker" movements). We don't have smartphones with BASIC installed. Computer makers don't even care about that aspect of their devices (that is, that they are programmable). Things have changed quite dramatically.