In my experience, it's systemic in rails applications due to how many ways you have to shoot yourself in the foot - it "just works" but not in a good way. "Oh,

In my experience, it's systemic in rails applications due to how many ways you have to shoot yourself in the foot - it "just works" but not in a good way. "Oh, this route takes 6 seconds to load. Why is that? OH, because it's making ten thousand database calls."