We strictly talking documents? It's very unlikely they will suffer from any decay since they are so lightweight. And to the extent that it's important you probably accessed it or shared it sometime in that period.
A video from the 90s that you never read or accessed in that period? Yes, a candidate for deletion, or at least a decay. For example, if it was a video, the transcript might be saved, but the video might be lost. We may also get some written interpretation on the visual elements of the video.
A video from the 90s that you never read or accessed in that period? Yes, a candidate for deletion, or at least a decay. For example, if it was a video, the transcript might be saved, but the video might be lost. We may also get some written interpretation on the visual elements of the video.