The point is that Project 9/11 is unreviewable, a problem that follows from the facts that it's unwritable and unactable.
The extent of the Vatican's financial holdings is one of the big unwritten (and unwritable) stories of our day.
Through this, old data is prevented from being sent to host devices as a result of unwritable failure, and unwritable failures can be dealt with without increasing the processing time to detect unwritable failures.