alt Hacker NewsAt this scale, there are no guarantees of anything. There very likely will be unique copies in there. If these were expert archivists a lot of damage could be prevented, but given the malice and indifference of AI companies, there very likely will not be an expert archivist involved, and unique copies will be destroyed unceremoniously.
My personal wastebook at home is so rare, it's unique. That doesn't mean it needs preservation.