One can give good advice, and still fail. Institutional system failure mode. It’s all just people. I shared the CISA backup guidance PDF link because Wikipedia [1] did not have a page for it, and so it was most canonical for the "3-2-1 rule". I've created an HN reference for future use as well [2].

If you don’t want to be sad, back up your stuff. If you don’t, you’ll be sad.

[1] https://en.wikipedia.org/wiki/Glossary_of_backup_terms#Terms...

[2] Data Backup Options [pdf] - https://news.ycombinator.com/item?id=48912185 - July 2026