"Writing the code with the assumption that a key will change is on the same level with premature optimization, in my opinion." Considering how easy it is, and

"Writing the code with the assumption that a key will change is on the same level with premature optimization, in my opinion." Considering how easy it is, and how often I've had keys change on me, I have to strongly disagree. "Frankly, if the code base is so littered with references to that specific data and key combination it might actually indicate a poor design." That's kinda the point of the article.