Lufthansa's on-board communications can be quite dire.
Flight to BKK cancelled at 02:00 after various attempts to repair a technical fault failed. Off we shuffle to the Sheraton, back we shuffle next afternoon to a new aircraft and a new crew who appeared blissfully unaware that this was anything but a normal flight. I was traveling with someone who works for the company at a senior level and he mentioned to a flight attendant that it might perhaps be an idea to acknowledge the fact that they were flying 300+ pax who had all been inconvenienced to some degree or other.
Blank look, so he asked to speak to the purser who said - quote - "We didn't get a briefing from the previous crew so we don't know what happened" to which friend said "Look at your passenger list, you can see that you have staff on board, you can see MY status, you MUST be aware from that that I could brief you (which he proceeded to do), now make an announcement. I'll write it for you if you like...."