With more information going to a cloud, and storage formats becoming obsolete faster, I wonder if we're actually better now. Certainly transitioning from hand-written and typewriter paper documents to digital has allowed for data to be copied easier than ever; however, I can still go to the library and read a book from 50 years ago or more. I can't do the same for digital data, at least not without specialized equipment and systems.
Hell, pulp paperbacks, probably the worst books for longevity, from 70 years ago are usually fine as long as they've only been gently read a low-single-digits number of times and haven't gotten wet/mildewy. They're often past yellowing and into browning at the edges, but they're fine for reading.
Hardcovers from the 19th century are pretty common. Tons of low-value ones (textbooks, fiction by at-the-time very popular authors who've been forgotten) floating around at a couple dollars a piece in flea markets here in the US, and I bet even older books are somewhat common in Europe. Lots by famous authors but of course those are usually more expensive. Most of those weren't finely-printed on modern archival paper or anything like that, and haven't been kept in archival conditions, but often have a few years of hard-reading life left in them (and much more well-shelved), so 150-200 years is a fairly easy age to achieve for gently-read hardbacks using cheap (but not the very cheapest) materials. Maybe more if you re-bind them once or twice, or they're very rarely read.
That's without even getting into really nice material and binding, or very expensive non-paper for the pages if you're very serious about keeping a book in good shape for centuries. Not even tape comes close—we don't have a really good archival format for digital stuff yet, let alone one that normal people may have a bunch of in their houses (like books). Maybe one of the several long-lived storage formats under development will take off one of these days and our digital storage will get a bit less risky. Right now it's pretty bad, only saved by being extremely cheap compared to other options.
Lots of documents are going 'paperless' these days to save the trees. Given what I've witnessed working in tech I'm worried that many of those systems will be backed by a single server with no backups. We are lucky that many of our documents are stored in email which is a little more robust but still it's no stone tablet.
