True, but the impressions made upon people, at that time in history, were monochrome, jittery and silent. Linking derivatives makes sense. Replacing original

True, but the impressions made upon people, at that time in history, were monochrome, jittery and silent. Linking derivatives makes sense. Replacing original works does not. And the little things matter. We will learn how much over time, and ideally we keep originals to benefit from the lesson. Really, what we do by augmenting originals is lock in one best guess interpretation. The point of history is for people to go back and see what can be learned, not settle on what everyone should have learned.