Put like this. The data is not safe.
To handle the ammount of data that would be archived ISP's would be required to servers with huge IO capability and connectivity, meaning your friendly neighbourhood hacker just got themselfs a wonderful new target of data, which could easily be sold on the black market for hundreds of thousands with what they could potentially get hold of.
To handle the ammount of data that would be archived ISP's would be required to servers with huge IO capability and connectivity, meaning your friendly neighbourhood hacker just got themselfs a wonderful new target of data, which could easily be sold on the black market for hundreds of thousands with what they could potentially get hold of.