If it wasn't a failure, why was it discontinued?
Look at NDLS-SHC clone, NDLS-Darbhanga Clone, Patna Adi clone, Dbg-adi clone etc.
Clone should run with 90+% capacity. SL 6 coach sirf vo fill hona koi badi baat nhi h.
Itni demand hoti to Shramjeevi clone chalti rahti.