Comment by maxglute

Against subsonic, low supersonic threats, short / medium term it's still about magazine depth and interceptor economics and sheer attrition math, i.e. PRC can build cheap interceptors at scale... has magnitude more targets due to sheer size, many of which are hardened, entire underground civil/mic infrastructure etc etc.

Physically, there is nothing preventing near 100% interception rates on subsonics and low supersonics. But once high end supersonics proliferate, things get spicy.