I am not sure what the exact status is.
I don't think it might be a question of will it work so much as how platforms might need to be in operation to intercept x number of missiles (where x is between, say 100 and 500 missiles.
A real problem that Japan, Taiwan, and some countries is the Middle East is the fact that they may need an operation missile defense within the next 15 to 20 missiles (some might estimate sooner than that0.
In Tom Clancy's Red Storm Rising, he writes about vampire attack, where a US Naval Task Force is attack by a swarm of anti-ship missiles.
This novel was written circa 1985 during the height of the cold war with a threat that the US thought was important to be able defend against for the sake of US surface warships.
At that time, CIWS were used to defend against this, but a certain number of missiles would be able to overwhelm that system AT THAT TIME.
Additionally, Red China (which its flagrant violations of human rights) is gearing up to be able to fire hundreds of missiles at Taiwan. This is a scenario that may be happen sooner than people might imagine.
That could be something that might be on our horizon before the end of the decade...
I'm about 97% convinced that we have satellite capacity to zap the missle on the pad. I don't know whether it would be like an EMP pulse or laser or what. But I believe we could disable it from space.
I'm convinced we could disable it from UFO type platforms.
But whether the puppet masters would allow such technology ATT, is another matter. I doubt it. They seem determined to keep such things in reserve for support of and empowerment of the global government.