What frustrates me most about Blu-ray audio is the lack of imagination. Like, just the album, sometimes not even in 5.1, with no extras, no interactive features, nothing. You take an album like What's Going On, which a) has a Quad mix that could've been included and b) has tons of extra material released on previous reissues that could've been added as a bonus. Like, why not include the Detroit Mix, and allow users to switch between them to compare, or that early '72 live set included in one of the reissues. (The Steven Wilson reissues are the exception to this rule, I'm mostly talking about the major label "Pure Audio" releases). These things seem like they were put out intended to fail.