The social network’s departure from San Francisco will mark the end of an era for San Francisco’s downtown Mid-Market neighborhood, where city officials once courted tech companies with incentives dubbed the “Twitter Tax Break.” Musk made deep cuts to Twitter’s workforce when he acquired the company in October 2022, and X only has about 120 employees left in San Francisco, a person familiar with the company’s plans said. The employees will be moved to office space in San Jose and Palo Alto,...