In this case, it appeared that Flame masters gave an order for the malware to vanish, leaving behind no trail that investigators might be able to follow or clues to its origin.
This might be true, but I expect that it will arise again in a modified form. It might be months, it might be years. A good piece of Malware like this is a too good a tool to just put away and forget about it.
Pbhtt... Well, Kaspersky Labs said the thing was out there for years (!!!). I’d say they probably have Flame v2 and v3 already ready for release.