The hive broke the bekenstine limit which is the limit on how much information you can store in a given amount of space. If they broke that limit on a drive the size of a shoebox they would know more than we could comprehend. Oh and i have a theory about thorn and dregden yor and how they might actually be able to convert guardians into hive. Meanwhile gravemind is a hyper intelligent being but is still limited by being a biological brain rather than the hives super science / magic computer things