Well, I do not know, No technology rules the world for Long... Same might be the case with Brahmos, But all I can Assure u is, Its pretty difficult to Chase down a Missile which is Not only highly sophisticated by its speed but also Maneuverability
I had seen this discussion in an another thread,how can a missile with supersonic/hypersonic missile can perform maneuvers without losing its velocity,I am not talking about the steep dive.

