Not all double albums should have been double albums, just as some albums had to be double albums in order for their point to be made. Each case is different with each band or artist.
The Who's Tommy and Quadrophenia had to be double albums to tell their stories of teenage wastelands and post-war angst. Personally, we would take Tommy over Quadrophenia any day, as far as albums go. As for their film adaptations, you can't go wrong with a pill-addled Ann-Margret rolling around in chocolate and baked beans.
Pink Floyd's The Wall, which will be performed in its entirety by main composer Roger Waters Saturday night at Toyota Center, is another album that absolutely had every right to be two slabs of vinyl.