Musk: Twitter staff must be ‘hardcore’ or leave

New Twitter owner Elon Musk warned yesterday that all of the platform’s staff must be ‘‘extremely hardcore’’ or face firing. Employees learned in a midnight email they had until today to decide whether they wanted to remain with the social media company. Those interested in working on Musk’s new iteration of Twitter were instructed to click a link in the email, and those who fail to do so by the deadline would automatically be dismissed with three months of severance pay. Musk went on to thank everyone who ‘‘helped make Twitter successful,’’