Man/woman machine interface.
It is incumbent on the pilot of any aircraft to monitor airspeed and altititude. No amount of automation can replace this duty. Obviously we still don't know what happened in this tragic case but appeals for further intrusive alarms and electronic intervention seem to miss this point. We seem to be pushing the pilot futher and further out of the loop thereby making the human interface the most crucial, yet the weakest, link in the control and management chain.