Podcast:Popcast Published On: Sat Oct 20 2018 Description: Is rock music in 2018 a sound, a mood or a retail category? Where do Twenty One Pilots, the 1975 and Greta Van Fleet fit in? Guests: The New York Times's Caryn Ganz; Rolling Stone's Kory Grow; the Ringer's Lindsay Zoladz Unlock full access to New York Times podcasts and explore everything from politics to pop culture. Subscribe today at nytimes.com/podcasts or on Apple Podcasts and Spotify.