For years, Marc Benioff has turned the quest to help San Francisco into a core part of both his political identity and his company’s mission. Now, the Salesforce CEO appears to be worried the city is too far gone. The executive told the San Francisco Chronicle on Tuesday that the city’s challenges with homelessness and drug use could drive away Dreamforce, his firm’s massive yearly conference in downtown San Francisco. “If this Dreamforce is impacted by the current situation with homelessness and drug use it may be the last Dreamforce” in San Francisco, Benioff reportedly said in the interview, which...