Or maybe they meant the large established-long-before-tech Asian communities in Sunset & Chinatown, the Latino/African American communities in Mission-Bayview, the Eastern Europeans in Richmond, or the Italians on Russian hill, the Russians sprinkled around Goddard, or the Vietnamese community in San Jose or .... I could go on and on.

If all you do is focus on tech its really easy to miss the massive immigrant enclaves that have formed in the Bay Area and won't be driven out so easily.