In 100 years most paper will be gone, thrown out, without any attempt to archive it. In 100 years most digital will be gone for the same reason. The exceptions in both cases is where something is “fortuitously forgotten”, a box left in an attic after a move, or a web page that remains in a fossilized state.

Preserving both paper and digital records requires the active effort of convincing people (some of whom haven't been born yet) that the records should be saved. That's the hard part.

Disaster recovery for millions of paper records is hard. So hard that even the US Government, which has been archiving paper records since its inception, sometimes fails. The majority of the 1890 census records were lost to a fire as well as a chunk of military service records (to a different fire). Disaster recovery for millions of digital records is much easier, make a copy on a different disk and give it to someone to hold. Repeat once a decade.