Comment by AdamH12113

From an API designer's standpoint (especially if that API has paying customers), Hyrum's Law is something that has to be taken into account. But from a user's standpoint, it is engineering malpractice, plain and simple. At the very least, relying on quirks of someone else's implementation is a risk that should be understood and accounted for, and no one has any reasonable grounds for complaint if those quirks suddenly change in a new version.