> Management drastically underappreciates the value of tribal knowledge.

they may, but i think it's that they prefer if there were no tribal knowledge - because it means having irreplaceable people, which makes for weak business continuation should accidents/issues arise with those people.

You are being downvoted, but I absolutely agree. Tribal knowledge (institutional knowledge) is a bug not a feature. It is lack of standardized processes and it is ultimately a failure of management to extract this knowledge from employees, any means necessary.