Back in the mid-80s was it even common practice to confirm cabin secure?
I have direct knowledge of ac when the pilots have not called 'seats for landing' and cabin crew have still been standing on touchdown - so no 'cabin secure' check there then.
I read an ASRS report where the aircraft returned to the gate for a tech problem. Captain told everyone to stay on board. One of the cabin crew stepped off to make a phone call and when she got back the aircraft had departed. Even her fellow cabin crew did not notice her missing until TOC.
At least 2 UK aircraft have taxied with baggage handlers still in the hold. First was spotted when cabin crew reported banging coming from under the cabin floor during taxi. On the second occasion, ATC called up and suggested that the aircraft return to stand - ground handling company reported 2 handlers missing.