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There have been plenty of instances of paper-based land registries being wiped out. It's just usually a very local problem because paper lends itself more to decentralized storage

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Yes, so quite limited in scope. We have no experience with storing and keeping accessible electronic records for hundreds of years, though, but we know already that accessing old storage media and formats isn't necessarily easy.

So far accessing old storage media from 50+ years ago hasn't really been a problem. Reading old tapes and punch cards/tapes or even early hard drives is something that a single motivated hobbyist can achieve in a few weeks or months with a microcontroller and patience.

But it's more difficult to imagine that 1000 years from now someone will be able to read from a PCI-E NVME drive if the specs get lost along the way (ignoring for a moment that flash storage most likely won't retain data that long).

I would not call needing weeks or months not a problem (assuming you also get the potentially proprietary software to understand the data recovered). Also, early hard drives weigh 100s of kilograms, so just physically handling them is difficult.

Totally agree on accessing NVME example.

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