This assumes an unbroken chain of people devoting time and resources to migrating the data. Any gap would mean that data is lost or requires much more expense t

This assumes an unbroken chain of people devoting time and resources to migrating the data. Any gap would mean that data is lost or requires much more expense to recover. Find a 3.5" floppy disk from 1995 with WordPerfect files on it and see how much effort it takes you to get the documents back. Now imagine 100 years have passed.