Have the Rockers Returned to Pop Music?

Charli xcx's pivot-declaring single "Rock music" was built off a single, scuzzy, thick, overpowering guitar riff. She announced, tongue-in-cheek, that she was "making rockkkkkkkkk music," devoting herself to the sensibilities of the Father, Son, and the Holy Spirit of the Velvet Underground (Lou Reed, John Cale, Nico.) And others were quick to agree, appointing her one of the artists "making rock…