Google embarked on a long mission to consolidate in the Bay Area and close small engineering offices. When Larry was the CEO he expressed his desire to have millions of engineers at Google, all in Mountain View. I can only attribute this strange desire to the fact that billionaires don’t notice housing crises and don’t have to sit in traffic. Sundar isn’t as much of a space cadet as Larry but he continues to consolidate. Some offices are established enough to survive, like Seattle and Chicago and New York, and others have to be kept open to attract specific people, but the company is really centered in Mountain View (and now Sunnyvale because obviously Mountain View is too small to contain the company).
Even San Francisco is to some degree a backwater office for engineers. Many projects have been “defragged” out of there, which is a term that means the project is given to some engineers in Mountain View and the original developers have a choice of finding a new project or moving there.