There was no telling what it might have accomplished over time as Iran installed more centrifuges and cascades. For this reason Barzashka believed the attackers made a mistake in unleashing Stuxnet too soon. Had it been held in abeyance until more centrifuges were installed and more uranium gas was in play, its effects on the program might have been more detrimental.
They made stuxnet too aggressive under Obama and decreased its effectiveness? But it did bring Iran to the table for the treaty with US, Europe.

