Passage Summary: The critic thinks rock music is garbage, and now that we don't have big vinyl covers with cool art anymore, there's absolutely nothing good left about the genre.

Conclusion: Rock music currently possesses no redeeming qualities.

Reasoning: Rock is inherently bad and destructive, and its only saving grace—the artistic album covers of the 60s and 70s—has vanished with the rise of digital music.

Analysis: The critic is being quite the 'get off my lawn' type here, but logically, they are assuming that the visual art didn't just move somewhere else. For the conclusion to be true that rock has *nothing* going for it, it must be true that digital music hasn't replaced the LP art with something equally innovative. The 'Gap' is the assumption that the end of LPs equals the end of all innovative visual art associated with the music. Look for an answer that negates the possibility of digital music having its own artistic merits or visual components.