We were using an external vendor for our production database (I've changed this now) and I was poking around their management console one morning when I notice something (I was about two months into this gig). The CTO walks into the office at that point and I ask him: "Hey, I can see that the staging database is being backed up, but the prod database doesn't have any backup files. Where are the backups for prod?". His response: "Press that manual backup button immediately, please." Turns out that production had been running for nearly three years without backup actually running...