The reason I'm in favour of a complete digital recompositing of the original elements where they still exist and are useable is thus: It would allow the original photography that effects are inserted into (background plates in most cases) to be better restored and cleaned without effects layers getting in the way. I don't see how taking the film apart into its original layers, restoring those, then putting it back together again minus all the damage and degradation photochemical compositing caused, actually undermines anyone's hard work or damages film history. It enhances it in my opinion. You get to see the effects artists hard work more clearly. Afterall if you restore an old car you have to take it apart - you can't recondition the engine for example without dismantling it first.