All this makes the assumption that S400 is a sitting duck with no countermeasures. Which is far from reality. The entire point of a decentralized and mobile/dis

All this makes the assumption that S400 is a sitting duck with no countermeasures. Which is far from reality. The entire point of a decentralized and mobile/distributed system like s400 is to make it difficult to target. It is ground based, therefore has much better detection capability than anything in the air. Its long range missiles have a greater flight envelope than any surface to air missile. You don't think the s400 has any jamming capability and protection of its own? You don't think the system can detect when it's being targeted and locked on? It can definitely be defeated but not without suffering heavy casualties. That's _why_ it's called anti-access/area denial technology.