Automatic Announcements
Long haul over night lights dimmed 90% of pax asleep (10%? very soundly asleep had a few G&Ts as a night cap perhaps), no loud announcement happily sleep on.
And before anybody suggests another pax will you give a nudge, I have been on flights with a 20% load factor and the nearest or pax is a long way away down the back and in the better class of travel (twice) with only one other pax.