IEA reporting is explicit that air defense and passive protection have stopped many attacks and have not stopped extensive damage. Repair happens. The next strike arrives before the fleet is whole. That cycle is what a long war on infrastructure looks like.

Both halves have to stay in the first telling. Threats stopped are real, and they are not a whole power system. Damage that arrives is real, and it is not proof that interception was theater. A briefing that keeps only one half will announce victory over a cold city, or announce that defense is fiction. The assessments are plainer than either headline.

The cycle is the fact a peacetime reader has to hold. Repair does not restore the original fleet if the next strike lands before the queue is clear. The stock ratchets downward. In that pattern a spare is not a comfort. It is one of the few ways the ratchet slows.

Passive protection — walls, nets, dispersal, smaller replaceable units — is the unglamorous twin of the interceptor. Decentralized generation is discussed for the same reason: a single large plant is a single aim point.

Interceptors deal with what is in the air. Walls and nets change what a hit does to a particular machine. Dispersal and smaller units change the aim point: more places, each less decisive, each closer to something a crew can replace without waiting on a unique piece of heavy industry. Those are design choices. They wear a war-desk consequence.

Smaller replaceable units are where this meets the manufacturing clock. A system made only of scarce, site-specific machines waits on however long those machines take to exist again. A system that also has smaller pieces can put something back on a shorter clock while the long one is still running. That is not invulnerability. It is a less brutal version of the same cycle.

None of this is a kit you buy for a suburb. It is the reason this paper’s War desk and Grid desk share a newsroom. The household translation is not a net on a roof. It is a short list of loads and a refusal to treat a spectacular defense as if it were a spare on the ground.