Hardly a month goes by without antitrust regulators taking another swipe at big-tech firms. On March 21st, it was Apple’s turn. America’s Department of Justice (DoJ) along with attorneys-general from 16 states sued the company. The case alleges that the firm uses its monopoly position in the smartphone market to “thwart” innovation, “throttle” competitors and discourage users from buying rival devices. Apple says the lawsuit is…