Doesn't Word store old data in the .docx, for things like revision diffs and to make saving quicker? Unless the filesize is really small, there might be a way t

Doesn't Word store old data in the .docx, for things like revision diffs and to make saving quicker? Unless the filesize is really small, there might be a way to extract the previous data... Maybe that was only in the old .doc format, though.