It may even mean the chain could be erased.
How should that happen? What could possibly trigger my nodes to fry or erase their storage in the context of a blackout event?
So the real question is does a paper printout exist?
Who knows? But I doubt that someone was that crazy. (Just in case: make the printout reliably machine-readable with enough error correction stuff so it can auto-correct scan and ocr errors.)
You can wipe all digital out with the right energy so did anyone print the block chain?
C'mon, seriously? That sounds a bit far fetched to me. I can't prove it, but it's highly highly unlikely that any digital copy of the Bitcoin blockchain worldwide could be erased within a short timespan.
... have fun re-entering the data back into digital form....
You're probably kidding, too.
There's computer technology for this, humans make too many typing errors. I'm old enough to have typed in hex listings for some machine code stuff on my Z80 powered home computer some decades ago. It's unlikely to avoid typos for even very few KiB of such stuff. You quickly learn that you want to have checksum bytes to quickly spot typos on-the-fly.
LOL, printing the blockchain... that's so day before yesterday. Burn it on archival grade optical media or something like that.
Someone for sure has offline backup media of the blockchain, too. I have monthly full backups with a retention time of one year with the previous from current month's copy stored outside my home. The town I'm living in would need to be obliterated to loose a copy, but then I'm gone anyway if I'm not on travel. And if some energy blast or alien death-rays would erase my backups, I'd have to worry about a lot of other stuff happening than about the blockchain.