Tandy (the former company) had many failed business ventures after the 90s. McDuff Electronics, Video Concepts, Computer City, Incredible Universe, all went out of business or got bought by another company.
McDuff was a appliance / television store. Video Concepts was pretty cool, they were the only store I remember in the US that not only sold Amiga computers but had them where you could try them out.
Computer City was Tandy's venture into selling other brands of computers, they also sold a brand called Victor that looked exactly like the Tandy x86 PCs sold at Radio Shack. They got bought up by CompUSA.
Incredible Universe was a place I worked for a little while. They had lots of sections in the store that were like stores within a store. One area was exactly like a mini-Radio Shack. When it was announced they were being sold to Fry's Electronics, Jim, the manager who was second in charge of the store and a former McDuff store manager had this to say " The problem with Tandy is they only know how to run Radio Shacks, they don't know how to run stores that directly compete with other stores. They only know how to sell lots of small junk with ridiculous markup."
Radio Shack was my favorite store as a kid. Not Toys-R-Us like normal kids. I used to religiously go there and get my free batteries each month. I loved the "Assorted xxxx" packages they had for $1.99 that had LEDs, capacitors, and other stuff. I had 2 Forest Mimms books, a 50-in-One electronics lab, 60-in-one electronics lab, and eventually a 200-in-One electronics lab and later a 200 Channel scanner which I used to listen to peoples analog cell phone calls on. (Before the FCC restricted that band from scanners) I remember hearing bookmakers taking bets in one particular frequency band. I just stayed in that area and heard phone call after phone call of people betting. I used to listen to the 2 meter guys talk back and forth and one time a guy gave out his phone number and I quickly rang it just for fun and heard him say on the radio "Well I guess we're not the only one's in on this conversation"
Tandy had a clearance / surplus store in Fort Worth that once a month they had a big sale and outside swap meet (or car boot sale as some of you loyalists might call it) where all the local hams would sell stuff.
My first 3 computers were all Tandy.
When I was around 5 years old. My dad picked up an MC-10 for $20 with the 16K expansion pack that was on clearance. I learned BASIC on that computer. It had a 6803 CPU.
A few years later I got a Color Computer 2 (6809E), an FD-502 floppy drive and a DMP-106 serial printer. When we got the disk drive, they said we could have any disk software we wanted for free so I stocked up on all the tan boxed Tandy programs they had like Factory, Bagasaurus, and many others. I also had the Editor-Assembler, and the Audio Spectrum analyzer, and Dungeons of Daggorath.
Eventually I graduated to the Tandy 1000HX and learned MS-DOS.
After that, I moved away from Tandy. Unfortunately, places like Sears and Best Buy had more computer for less money.
So I guess I would have to say that Radio Shack played a large part in my life as a kid and adulthood. I'm about 90% sure if I hadn't have gotten my first computer there at age 5 I would have became an electrical engineer instead either way, Radio Shack had a lot to do with it.