Butch Walker talked with COS in a new wide ranging interview:

Keep in mind, as a producer, this is the ugly side, where longtime fans of a band hear that they want to “broaden their horizons” and do something different, and the first thing they do is shoot the producer. They hate the producer because the formula for their Coca-Cola got changed and they are very mad because of a band wanting to do something different.

To Green Day’s credit, this vision was Billie’s. This was his vision. It wasn’t like I came in and said “let’s change it all up, let’s make a ’70s glam throwback record.” But at the same time, this was the kind of shit that he was into at the time, and it’s my wheelhouse. I love making records like that and those are huge influences for me too, I grew up on glam and power pop and metal and rock. So we had a great time making it and it was absolutely a collaborative effort. We spent a lot of time sending files back and forth — COVID was looming but it hadn’t hit yet. They have a very over-qualified massive studio in Oakland and of course, I have my sandbox, and I was like, “Hey, I work best in my sandbox,” and Billie would be like, “Okay, cool, I usually work best in mine.” So I was like, “Great, let’s send stuff back and forth and then we’ll get into the studio.”