I have made collage work myself, and watch with interest as the early work of Robert Rauschenberg and Kurt Schwitters loose much of their graphic edge as the materials used slowly merge into one brown, muddy mush.
Some collage work matures with time in a positive way. Artists such as Joseph Cornell or Edward and Nancy Kienholz build into their works a pre-aged patina. Entropy acts with empathy in these works.

I have no desire for artworks I have made to survive the millennia, or even the century. But I do want to know how they might look in the near future and produce work from a point of knowledge.