The missing plane continuing to be missing seems to remain newsworthy. I suppose the longer something remaining missing the more newsworthy it should become. It tends to peak I guess. And then tail off.
The graph of interest (y-axis) against time (x-axis) looks a little like this with a news event.
It’s necessary to say that the time access is not a linear scale. The first peak is after a few hours of something deemed missing and becomes very interesting and newsworthy. That dies off steeply after about a week or so.
So that first peek’s end is about seven days in. The second peak is not a finite amount of time after the first peak, it’s the december following the missing thing going missing. The interest arises from all the mentions of it in end of the year round-ups.
The final peak is on like the tenth anniversary or something.
To be honest it works for most things and not just things going missing. It also neglects momentary blips when something similar happens and everyone remembers it. Also ignores talking head documentaries about the decade or something.
Though it can be applied to most news stories it is all the more obvious with an unsolved missing thing. Everyone get’s bored when they can’t solve something and feel all clever. They just go back to crosswords and sudokus. “There it is! oh….it’s just a regular plane…what about if..no…I’ve not got it..fuck this, name the British Prime Ministers of the 20th century etc”