> For example, if you've extracted something into its own function, are you then sharing this function and using it in other places as well? If you then change

> For example, if you've extracted something into its own function, are you then sharing this function and using it in other places as well? If you then change the body of that function, are you now possibly breaking other parts of the code that relied on its old behavior? You absolutely are. Which is why I think that DRY was pushed too hard, and for the wrong reasons. Everyone said "you only have to change it once!" rather than "consider how many callers depend on this". There's a reason the "rule of 3" came around; and those reasons I've found were mostly experience and empirically based.