None of the interviewers know who he is, so he probably never gets asked about.

He didn't sing as prominently in the group, either, so Mike can't mention that like he did with Carl. I've got friends who aren't into the Beach Boys and when you mention Dennis, you get this blank stare. They know nothing about him. Don't even know that he died. When you mention Carl, you can say "He's the guy who sang Good Vibrations" and they go "Ooooohhhhhh".