@nprofile1q... @nprofile1q... > that is a very poor-quality source; modern SSDs indeed hold data for years,
With no corruption at all?
Remember, for some data, a single bit flipped (and not caught by error correction) is enough to ruin it. If those bits are core filesystem structures, that can snowball pretty quickly.
> powering them also doesn't increase data retention;
No, you'll need active interaction with the data, though I'm not sure if simple read-only access is enough (in which case filesystem scrubbing does the job just fine).