[publius911]

When that other airliner disappeared about ten years ago (and was never seen again) - did Israel prepare the same way they are now?

Things have improved somewhat in the last 80 years. In the art of aircraft design, communications and other useful technology.
Still, the "without a trace" modifier is overused; Those are a meaningful handful, in the "airliner" category, remarkable when considering the millions of airliner flights worldwide since 1945.

Here is one list :

Aircraft which have disappeared

[Star Traveler]

That’s not really a list of the kind I’m talking about. They do list the “one” that I was talking about, along with a mishmash of other “disasters” ...

[nanetteclaret]

This list doesn’t mention the plane carrying Glenn Miller, which was never found. (December 15, 1944)