Most teams run four or five models across one codebase and almost never record which one wrote what. So when quality drops, there's no way to tell a model problem from a prompt problem from a people problem. You're debugging with the label torn off.
Every productivity pitch for two years has been about typing less. Typing was maybe a tenth of the job. The rest was deciding what should exist and noticing when the thing in front of you is wrong. Neither got cheaper.
The hard case was never code that fails. It's code that runs, passes, reads fine, and is quietly wrong about one thing. Tests don't catch that and a fast skim doesn't either. It takes somebody who knows the system, and that person doesn't scale.
Output went up across the whole team. Review quality didn't, because it was never even to begin with. The gap between your strongest and weakest reviewer used to cost a few bugs a quarter. Now it's multiplied by every line an agent writes.
