Selfhosted

Nothng official, sorry, wish I did!

Mostly personal experience. But that experience is also shared among a group of peers and friends in the SMB space where their clients think they can keep stuff on externals in an office safe only to find they've gone tits up nearly every time they pull them out a couple years later. And not the enclosures, the drives themselves - they all have external drive readers for just these kinds of circumstances.

In the enterprise you'd get laughed out of a datacenter for even suggesting cold drives for anything. Of course that's based around simple bit rot concerns, and why file systems like ZFS use a methodology to test/verify bits on a regular basis.

If nothing else, that bit rot should be enough of a reason to not store data on cold drives. It's not what drives were designed (or tested) to do.

Edit: Everything I've read over the years suggests failures happen as much from things like lubricants hardening from sitting as from bit rot. I've experienced both. I've seen drives that spin up after ten years but have numerous data errors, and drives that just won't spin up, while their counterparts that have run nearly continuously are fine (well, their bit-rot was caught by the OS and mitigated). With a running drive you have monitoring, so you know the state.