SANTA CRUZ, Calif. (AP) — Netflix’s trailblazing DVD-by-mail rental service has been relegated as a relic in the age of video streaming, but there is still a steady — albeit shrinking — audience of diehards who are happily paying to receive those discs in the iconic red-and-white envelopes. The service that has shipping more than 5 billion discs across the U.S. since its inception nearly a quarter century ago may not be around much longer. Its customer base has dwindled to an estimated 1.5 million subscribers from more than 11 million in 2011 when Netflix spun it off from its video streaming business. Co-CEO Reed Hastings has previously suggested it could close in 2023.