" Spearheading the assault on this legendarily bleak and intractable stretch was Twitter, which in June 2012 moved 800 employees into a building between 9th and 10th Streets. Though mid-Market is on the Tenderloin’s borders, the move was a portent. It struck me as ironic that a social media company, specializing in creating disembodied “communities,” might simultaneously destroy and revitalize the neighborhood that had once been a dense nexus of city life. "

― , Cool Gray City of Love: 49 Views of San Francisco