It's not only paranoid people who keep offline backups, it's those that understand the threat models where data can be destroyed through logical or physical acc

It's not only paranoid people who keep offline backups, it's those that understand the threat models where data can be destroyed through logical or physical access to all storage locations. For arguments sake, I'll focus Google services. As I personally discovered recently, docs offers minimal protection for your data: 1. Docs shared with you (others are "owner") can disappear without notice. 2. Manual clones are the only way to keep a copy of shared documents. 3. The GDrive agent keeps no local copies of docs, only urls. 4. Any deletions made >25 days ago are unrecoverable. 5. Deleted accounts have only a 5 day undelete window. When you combine these it means a document you've contributed to may quickly disappear forever as the result of mis-actions made by someone else or their employer/educational institution. You may have assumed "all changes saved to drive" meant into your account, but you'd be wrong. Similarly removal of items from trash in GMail/GPhotos is permanent. If someone maliciously gained access to your Google account (or one of your devices) they could quickly and easily purge your data. These deletions would quickly and efficiently propagate to all your devices and purge the canonical "cloud" copy.