When online became infested with counterfeits and opened returns with no way to distinguish.
Anyone ordering computer parts from Amazon is just asking to get fleeced nowadays.
I doubt Microcenter ever expands to the number of locations that BestBuy /circuit city/compusa/etc had, but it might have enough of a market for one or two locations in the top 10 to 20 metros.
Micro Center might not be optimal on price, but sometimes you just want to wander a store full of cool stuff and maybe walk out with something you didn't expect, instead of another anonymous box of schmutz from Amazon or wherever
https://www.microcenter.com/product/652517/pny-nvidia-rtx-a4...
It also depends on your local market; my location seems to carry more server and HEDT gear than others (they stock more A- and W-series GPUs than 5090s, at least). They've also purchased things I've requested, like ECC DRAM for my Threadripper, which I also purchased from them.
If the customer isn't savvy the knowledgeable customer service adds a lot of value.