Why would anyone store 1TB of data in highly redundant JSON? Stored as protobuf, I estimate it would be 8x smaller. A custom binary format would be smaller ag

Why would anyone store 1TB of data in highly redundant JSON? Stored as protobuf, I estimate it would be 8x smaller. A custom binary format would be smaller again. Not only is that smaller, which saves storage and transfer cost, it's also proportionally faster to process.