Why Monitor? Models Decay

Day 71 of 100 Days of MLOps, and Module 8 begins. A model that was accurate on launch day doesn't stay accurate — the world drifts away from the data it learned, and the model silently gets worse while returning predictions as confidently as ever. You'll watch a frozen model's error explode from $15,721 to $240,334 as its market moves on, with no error and no crash to warn you. That silent decay is why monitoring — not just retraining — is what keeps a production model honest. Runs 100% locally on any OS.