Certainly pre 21st century since my favorite composers are from that time. We used to have Lizst, Alkan and Beethoven, now we have Nicki Minaj, Lorde and Justin Bieber. :P
But I can recognize that we still have some good composers, singers and bands, like Temples or Tame Impala, for example.
Bet with Teeqoz for 2 weeks of avatar and sig control that Super Mario Odyssey would ship more than 7m on its first 2 months. The game shipped 9.07m, so I won