What Takes Them So Long?

Is there a label that lags longer in reissuing and/or remastering their CD's than Sony/Epic? It's 2007 and we finally get upgrades of Silk Degrees and Out of The Blue. With the promise of Sly & The Family Stone reissues. But Sony, unlike and other major label you can think of, sits on their product for years. And some artists only get a fraction of their recorded output reissued. Harold Melvin & The Bluenotes come to mind.
Getting back to Silk Degrees, it's one of the great blue-eyed soul records. And as the liner notes exclaim, it never got the critical respect of say, the Van Morrison records of that era. Scaggs can be blamed for this as well, he never followed up with anything as memorable. ELO's 1977 opus was Jeff Lynne's last major statement. Although I have a fondness for 1979's discofied Discovery, Out Of The Blue is where Lynne laid his greatest vision.