Or to have great onboarding, people learn a lot, are effective quickly, and leave after learning enough. The know-how is then embedded in the process not in people, which guarantees stability, while people are guaranteed to change.
If you can embed all of your organization's knowledge in a few weeks of a single person's study, then you don't have much knowledge to begin with. Such stuff might be good for a small factory, but for nothing more complex than that.
