Does SF really need investment from FAANGs? SF was a pretty awesome city before the tech boom of the 90's + 00's, and currently none of the FAANGs have a major

Does SF really need investment from FAANGs? SF was a pretty awesome city before the tech boom of the 90's + 00's, and currently none of the FAANGs have a major office presence here... FB in Menlo, Apple in Cupertino, Amazon in Seattle, Netflix in Los Gatos, and Google in MV.