I guess the idea of an automatic PA would be good but only if it could be at a higher volume and clearer than many PAs on many fleets (not RYR here).
OOI what was the Concorde special measures? I don't recall anything when I flew a long time ago, as PAX, but memory and time...
I wonder if, in the days of online booking, somehow the passenger's language could be captured and they receive a copy of the safety instructions in their own language EACH booking. Sure many will ignore it, but...