When Fry's died during (not because of) the pandemic, basically half the comments on articles were "oh no, what about Micro Center?" to which the immediate response was invariably "they're all completely packed" (partially due to the pandemic meaning everyone wanted better computer gear for WFH). During the height of the GPU shortage, it was often said that your best chance of getting a GPU was going to the nearest Micro Center. On all of my more recent trips, Micro Center has seemed to do pretty strong business.
Somehow, Micro Center does seem to have found a strong niche that makes it survive as a brick-and-mortar store in an increasingly online store (hell, Micro Center's website is pretty notorious for looking like a 90's webstore). Part of that is probably knowledgeable salespeople (something Fry's was known for lacking). And I think there's also a savvy psychological rationale behind its expansion policy--its stores always come across as just a bit too small, and its locations too few, but the flip side is that you don't have cavernous spaces you need to fill (like Fry's did).