There is more than one kind of documentation. Descriptions are great for understanding systems, but runbooks, checklists and such are useful prescriptions.
When you've got a crisis and need to restore the system from backup it's a huge relief to open up a binder and find step-by-step instructions to get it up and running again.
When you've got a crisis and need to restore the system from backup it's a huge relief to open up a binder and find step-by-step instructions to get it up and running again.