reasoning for any musician not to like playing their old stuff is the same through out. imagine OSC for chester, the older he gets the harder it is for him to nail the screams. plus you have fans who hate any type of music progression the band tries and wants them to stay with the old style. Its enough to make a person detest a song. When you get a chunk of ppl who's first response to anything new is "wtf its not OSC, i hate it" regardless if its the song that makes you famous, you grow to not be found of it.