What would happen to the black box in a crash like that???
Vertical dive would damage the boxes. But the data media stands a very good chance of surviving.
The Boxes are in the tail and are protected by the entire length of the aircraft as to crush deceleration. It would still take a lick.
The boxes are the most armored items and are built with the idea of surviving a crash. They will break free of their mounts in this type crash.