Even as Metallica rides high on the charts with its new 72 Seasons collection, drummer Lars Ulrich says the band has more than enough material to last them through the end. During a chat with Revolver, Ulrich spoke about all the unrealized and unmined musical bits the band still hasn't realized: "We have enough ideas for another 20 records. We will never get all the riffs and the ideas to fruition because history dictates that that's just not gonna happen. There's never a conversation about should we make new music as in should we not make new music. New music is a vital, vital, huge, huge, significant part of who we are." Ulrich said that he views how well an album does in a completely different light than he did when Metallica was coming up, explaining, "I would say a big thing for me about the success of this record is the joy of making it. So, in the past I think there have been times where you had to make a record. The record company (would tell you),