I hope photos from today can be retrieved from hard drives, servers, and the cloud, as platforms and hardware change, so that people can continue to retrieve these images from our past. Letters, emails, and blogs of significance as well. Right now, for durability over time, paper is still the champ. Newspapers and magazines if given half a chance outlive their microfiche facsimiles by far.
Civil War letters written by officers with fine new fountain pens (high tech then) have often faded into history, whereas letters written by enlisted men in low tech pencil live on. Newspaper "morgues," files of clips and other documents, have almost universally been trashed.