"if we had the technology to recover data after it's been overwritten, we'd be using that technology to double hard disk capacities." If we have the technology

"if we had the technology to recover data after it's been overwritten, we'd be using that technology to double hard disk capacities." If we have the technology, then like an electron microscope, it might not be feasible to implement at a size and a cost that would be viable in a storage product, but would be viable as a forensic analysis tool.