AI-Generated Code Is a Time Bomb: Why 40% of It Gets Rewritten Within Two Weeks [2026]

AI-Generated Code Is a Time Bomb: Why 40% of It Gets Rewritten Within Two Weeks A study analyzing 153 million lines of code found that AI-generated code churn — the proportion of newly added code that gets updated or deleted within two weeks — jumped from 33% to 40% since AI coding tools went mainstream. That's not a rounding error. That's a structural shift in how we build software, and it points to something most teams aren't talking about: a maintainability crisis hiding beneath all the produ