When Charli XCX —whose tossed-off quotes have lately had as much impact on the zeitgeist as most world leaders’—openly mused that “the dancefloor is dead” last week, many leaped to argue the exact opposite. You can safely ignore most pop stars when they make sweeping, declarative statements about the state of culture at large. We are not yet living through Gen Z’s “Disco Sucks” moment. But Charli’s quote has lingered in my head ever since listening to Jessie Ware ’s dead-on-arrival sixth record, Superbloom . I hate to admit that this time, she might actually have a point. Ware broke out in 2012 with a debut that established her as a torchbearer for sophisti-pop and the Big British Ballad. She sensed the winds change with the brutal response to her 2018 Coachella performance, an event so technically marred and painfully out of step with her crowd that it prompted her mother to counsel: “Darling. Quit.” Ware’s subsequent record, What’s Your Pleasure?…