Let's ask, again, what caused the aircraft to depressurise? What agency/ies will be responsible for the investigation? When will the report be produced? Where will the report be published? I ask these questions because I have yet to discover from any agency whether a report has been published on the Ryanair landing incident at Limoges on 21 March, in which I was a passenger.
On the question of briefings for passengers might I add this - most airlines produce inflight magazines which are full of inconsequential rubbish. Why not oblige them to put in further safety information for passengers (procedures in the event of... and details on oxygen airflow indicators, non-inflation of bags, low flow rate, duration of flow etc) which the cabin crew can refer to at the end of the pre-flight safety briefing.