In 2009 Airbus went public with a new feature in the Airbus A350, an Automatic Emergency Descent (AED) System.
The system would detect a rapid depressurization and, after a defined waiting time, would initiate an automated descent if the pilots failed to respond to the respective alert (i.e. in case of pilot incapacitation).
I found some presentation slides from 2015 on the topic but haven't heard anything on that system since. Does anyone have additional information: is it a standard feature now on the A350, is it optional, or was it not pursued any further? If not, for what reasons?