Garib Rath train is comprised of ICF coaches whereas a Humsafar train is comprised of LHB coaches. Garib Rath trains can’t be replaced by Humsafar trains all of a sudden because for that, Indian Railways need to manufacture more and more LHB coaches to replace those ICF coaches which needs time. Further, ICF coaches can’t be condemned immediately because these have certain service life and hence, have an asset value attached to it.