Jo Bhi ho, as a Traditional Shatabdi chalaye, as a Vande Bharat Express chalaye, as a Day Time Tejas chalaye- bas shuru honi chahiye.
Humongous passengers for Solapur and good amount of passengers for Secunderabad from Pune.
I won't even mind Mumbai extension in case it becomes Vande Bharat Express and it could cover additional distance in a day.
This service should start.