uber makes a great point in that they have never really left us. As far as them ever being really popular again, I think it depends on the advancements that are made with DAC sound quality. That said, there has been notable advancement in that area over the last 5 years or so, it could happen. On the other hand
due to streaming, it probably has as much chance as disco or the hula hoop to ever being popular again. Who knows.