A lot of people live in the Bay Area. The 9 county area has 7.68 million people [0], enough that it would be the 102nd (of 234) most populus country in the world if it were its own country [1]. Countries with similar populations include Switzerland, Israel, and Hong Kong (all relatively small and dense).
Anecdotally, I dont see much vacancy in commercial/retail real estate (mini malls or otherwise) in the Bay Area, and with nearly 8 million people living here, there is an obvious need for quite a bit of commercial space.
[0] https://en.wikipedia.org/wiki/San_Francisco_Bay_Area
[1] https://en.wikipedia.org/wiki/List_of_countries_by_populatio...
And from my anecdotal experience when visiting, the older mini malls surrounding it have less foot traffic. Which makes sense, because everyone wants to go to the new shiny places. And it's not like these places were overly crowded in the first place.