Refactoring IDEs were a thing back in the day. "Less than 35 bugs were found in the 17,100 changes." https://news.ycombinator.com/item?id=42473314 https://new

Refactoring IDEs were a thing back in the day. "Less than 35 bugs were found in the 17,100 changes." https://news.ycombinator.com/item?id=42473314 https://news.ycombinator.com/item?id=42473314