I think you might be dismissing the article while actually agreeing with its core argument. It's not about a substrate on which reality is running - it's about

I think you might be dismissing the article while actually agreeing with its core argument. It's not about a substrate on which reality is running - it's about access to the mechanisms of consciousness and how our view of consciousness doesn't reflect those mechanisms fully. Dennett's explanation basically uses Hofstadter's conception.