They appear to be talking about a device that has already reached the end of its usable life, and is then powered off and stored at a temperature so high as to

They appear to be talking about a device that has already reached the end of its usable life, and is then powered off and stored at a temperature so high as to be hazardous to humans. I have never heard of anyone relying on used-up SSDs as an archival medium (used-up SSDs rarely work at all in my experience; even the simplest recovery test will surely fail), and I have never heard of anyone storing archived data devices of any kind at 55C. That's just silly. It's worse than a worst-case scenario, in that it requires multiple fundamental flaws in the archival system design to be relevant. It's basically analogous to saying that information written to paper will be lost!* (*when the paper is stored in fire). Filesystems are not magic data restoration fairies. Checksums just tell you when your data is gone; they don't bring it back. Always mirror or erasure-encode, and store mirrored pairs in separate locations.