As do I if the box is composed of mostly intact original cds. But many of the multiple disc "complete recordings of.." are not organised that way. None of the Mosaic sets are set up like that, nor are any of the complete Coltrane sets (Prestige, Atlantic or Impulse) or the various Columbia Miles Davis boxes. All these tend to be in chronological order and that seldom corresponds to the structure of a released album. I have a track custom field that identifies the original release format (some were originally 78s or 45s) and album title in these cases, but I have no way to add the original cover art and that's what I am after.
I should also say that there are some single CDs that are compilations where I would like to be able to attach the original cover art work for the album each track came from to that track.