Ok -one themed pop music beyond 50 minutes. Hmmmmmmmmm. Well it depends of course on what you define as pop, and though I dont have the current Sufjan disc (yet) I do have the previous release and his stuff is a little homogenous ,(here comes the but), but, it makes me think of the double disc releases of the seventies (excluding live ones), and Goodby yellow brick road (very loosely -theme of loss of innocence, childhood )or pink floyd -the wall (semi-autobiographical) , Wilco (sorry 90's)-being there (theme anyone), .....got to run now but I think some of these counter the point.