Simple: MicroCenter left California. It’s extremely difficult to do business here and be profitable with the tight margins involved in computer retail. California is booting them out and spoon feeding non B&M retailers like Amazon.
It would be nice to see them enter (or re-enter) the Northern California market now that Fry’s has imploded. It seems like they have the niche figured out, and apart from Central Computers’ handful of good-but-small locations, they’d have the market to themselves.