Paper records can last for hundreds of years without the support of any expensive infrastructure. I wouldn't bet on things that are stored on s3 being available hundreds of years from now.
Some of paper lasted for hundreds of years. How much of information didn't survive during that time period?
Information on s3 might not last for hundreds of years, but AFAIK the Voyager satellite didn't ship the information about our specie on paper.
Whereas, the older tech that lasted so long used simple components on older, process nodes with careful engineering practices. The better ones were also extremely costly with Voyager being a good example at $800+ million.
But we're just dealing with simple physical facts about paper here. All you need is a safe place to store it. S3 doesn't run without constant and costly maintenance.