Erin McGoff keeps hearing the same concern from workers: that using AI endangers their jobs. "I have people who say that they, every day, feel like they're training their replacement," said McGoff, who founded and runs the career-education platform AdviceWithErin. A recent poll found that 30% of Americans believe their jobs may be made obsolete by AI. Meanwhile, more college students are changing their majors because of what AI might mean for the job market. The anxiety isn't unfounded .