This is a great point, I think a good developer -- has respect for other's code and perspective, he/she doesn't think that the previous developer did a bad job writing the code in first place. Many times the the code/solution that is better at times may not be good enough in long run -- also a good developer is one who would write code/logic in such a way that the future developers would understand it easily. Sometimes having good comments in code could easily increase longevity of the program