A new research paper from GitClear found that the use of GitHub Copilot, an AI-powered coding tool, is associated with a decline in code quality and maintainability. The study analyzed 153 million changed lines of code and found that code churn, or the percentage of lines that are reverted or updated, is projected to double in 2024 compared to 2021. The paper suggests that AI-generated code can lead to more mistakes and less refactoring, resulting in lower quality code. This finding contrasts with other studies that have shown GitHub Copilot to improve developer productivity and satisfaction.