ah, thanks for catching the typo, it was getting late for me, I should have pulled up a link or something because I haven't worked with these discs in a decade or so..

yeah those are the ones I'm referring to -- if you're archiving something like family history or data that needs to be good for centuries (without having to re-copy and juggle), those are a better choice than just about anything else.

https://en.wikipedia.org/wiki/M-DISC

What beats M-Disc? Genuinely curious just having bought one.

Nothing comes to mind that you can interface with a computer, but when I wrote the phrase I was thinking of projects on the scale of Long Now [0], requiring physical etching on materials and very careful storage.

Alternatively, tell people that they can't store something and you're likely to find it robustly mirrored by many.

[0] https://longnow.org/ideas/very-long-term-backup/

Well that was a fascinating diversion. This is bonkers!

https://norsam.com/products/buddhist-nano-film/