I lost about a month of family chats to a Samsung NVME. Yes, I was taking daily backups of the DB, but the damn drive didn't fail catastrophically and instantly. It just started silently corrupting the database, causing little errors until I noticed a month later. By then, my only option was to restore from my backup right before the first error.

The irony is that I'm a huge BTRFS fan, and use it on all my desktops. But this was a database on a server, so of course use EXT4 and be fine with silent data corruption. :/