Cyber-warfare capabilities on this level seem pretty horrific. What if you could simply turn off the power grid of Kyiv or Moscow in anticipation of a strike? That seems extremely disorientating. What if you could simply turn off the power grid indefinitely?
From what I remember reading, they were able to gain air dominance not because Iranian air-defense was bad, but because it was put almost completely out of service for a brief period of time by people on the ground - be it through sabotage, cyber-warfare, drone attacks from inside, allowing the Israeli jets to annihilate them.