OO bugs that I see are actually in the “invisible” parts of objects, as these require more experience to know what is really going on. For example, failing to

OO bugs that I see are actually in the “invisible” parts of objects, as these require more experience to know what is really going on. For example, failing to implement necessary operators (or worse, implementing them in ways that are subtly incorrect). Knowing how to implement object “glue” properly is something that just doesn’t come up if you’re using simpler programming styles, and in cases like these it’s better to pick the simplest and most maintainable approach that will suit the task to avoid pitfalls.