130kmph for Mumbai locals is a wasteful expenditure as this can seldom be achieved on mumbai suburban station where inter-station distance is from 1-2.5km only. Even long distance SF with LHB coaches are being operated at 110kmph, 130kmph for local trains is too futuristic.
However, after completion of CCG-VR six lines, there will be a dedicated suburban trains fast corridor. 130kmph trains can be introduced on the fast corridor, while the slower old rakes continue to serve the slow corridor.