It was also a library of anything electronic. You could get books on everything... and starting out for basics, there were those 100 in one boards that one could make circuits with, so you learned what a resistor was, what circuits work with diodes, a switch, and many other things.. AM radio, etc. If one figured out a circuit, then it was easy to head to RS, pick up the parts needed, breadboard it... or if you were feeling like a challenge, the PCB etchant kit which consisted of PCBs, a Sharpie, and FeCl3 in a bottle that you swished around this side of forever to etch all the copper off your hand-drawn PCB. From there, use a drill bit, and then drop your through-hole stuff in (at the time, not much was SMT.)
Is it better than now? Debatable. With how easy it is to have boards made and SMT stuff done, one can focus on how to use the chips, not praying that your 555 and your 741 didn't have a solder bridge, otherwise you are making magic smoke. However, just being able to throw components together and figure out what did what was invaluable.
I miss these days.
What I can see a resurrected Radio Shack being like, would be a makerspace. Decent 3D printers (Bambu, Prusa), high quality filament, good laser cutters, and so on. Going full MicroCenter is out for computer parts selection, but having basics like RAM, hard drives, and other basic accessories would be a boon. Cellular stuff is fine, but the days of running a store from that are long gone.
What would resurrect Radio Shack type stores is more user repairable items. RtR would greatly help here. One reason RS died was because people just tossed their electronics and bought them, as opposed to repairing them.
Of course, add some old school Sharper Image with some cool new gadgets every so often, and this brand can be brought back from the dead.