A scheduled job has two failure modes. The loud one throws an error and your alerting catches it. The quiet one just stops running, and nothing catches it, because your alerting is wired to the job itself. No job, no error, no alert. The data it maintains gets staler by the day and every downstream system keeps serving it like nothing's wrong. I run a handful of production systems by myself. One of them is a niche content site with a curated data feed behind it, plus a release-tracking pipeli...