Not heard of party canon. Pop increasingly seems to be compromised of actual teenagers singing about being teenagers, hip hop has developed a social conscience so in some ways going full circle. I have no idea about new metal bands. I’m still stuck in the Motörhead/Sabbath dark ages.
Edit: Forgot Jazz. Will add blues to this. Another poster on Basschat is in a blues band and described his audience as “grey hairs and no hairs” which is my experience of going to gigs of the genre. Real shame and needs new blood and energy. Thankfully metal seems to keep re-inventing itself and has so far escaped the demise.