Warrant officers' subject expertise is only part of their influence. Long service also gives them knowledge of recurring problems and earlier decisions. That knowledge can extend across several generations of officers. The joke about knowing where the bodies are buried expresses the practical advantage of remembering what successive commanders have inherited.
Notable Point · 2:00:48-2:01:11
Senior NCOs preserve institutional memory
Warrant officers combine specialist expertise with knowledge that survives changes among the officers above them.