Dashboards are a pull medium. You have to remember to check them, find time to open them, and then interpret what you see. For engineering leaders who are already managing incident queues, planning meetings, and code reviews, that pull rarely happens...
Most teams use one signal to judge deploy risk: how big is this PR?
It's intuitive. A 50-line change feels safer than a 2,000-line change. But it's also wrong — or at least deeply incomplete. Some of the highest-risk PRs ever merged into production ...