A client in the early stages of planning a knowledge management program brought a new employee onto the team. In meeting after meeting, the new hire heard Mickey referenced in the context of critical functions — the place answers came from, the thing work had to go through.
Eventually they asked a VP how to get access to the Mickey system. The VP laughed and explained that Mickey wasn't a system. Mickey was a person: an employee who had been there for decades and was the main expert on an entire business function.
Everyone who had been there a while had stopped hearing it. To someone new, an expert bottleneck was indistinguishable from a system.
Glymr client story (anonymized) — company and identifying details withheld