https://andysylvester.com/2024/04/12/knowledge-management-and-organizing-information-for-use/

(6:13) Andy mentions lost "tribal knowledge" with respect to corporate information. This aphorism seems fairly regular in Western countries, but the interesting part about actual tribal knowledge is that it would have been stored with several people and spread out in ways to make the accidental deaths of individuals not able to take the knowledge to their graves with them.