Worrying about this is not the central concern of my life. But it is important to consider both directions in which we could lose the ability to access information that requires machinery to make it human-readable-- technological progress or regression. Especially over the centuries-long time frame archivists need to consider. We need to make the attempt to keep the information available in its original format (or a format updated to the technology of the moment), but also to preserve the information (or a description of it) in a form we know can last the ages.