Then perhaps we have different definitions of what "why" comments are. The usual reason we write code is to solve (business) problems, so to me, "why" implies a

Then perhaps we have different definitions of what "why" comments are. The usual reason we write code is to solve (business) problems, so to me, "why" implies a connection to business requirements. So even though > The unchanged code still functions as it always did. ...the why of that unchanged code, i.e. the reason it exists at all, may change. And for that reason, the "why" (the business reasons) should not be in the code.