This is something that keeps me worried at night. Unlike other historical artefacts like pottery, vellum writing, or stone tablets, information on the Internet can just blink into nonexistence when the server hosting it goes offline. This makes it difficult for future anthropologists who want to study our history and document the different Internet epochs. For my part, I always try to send any news article I see to an archival site (like archive.ph) to help collectively preserve our present so it can still be seen by others in the future.
Remember a few years ago when MySpace did a faceplant during a server migration, and lost literally every single piece of music that had ever been uploaded? It was one of the single-largest losses of Internet history and it’s just… not talked about at all anymore.
Things seems to be forgotten as quickly as they were lost.