Passenger trains renamed Express... and most Express trains classified as Superfast. It is now rare to find a non-SF express on most stretches. It used to be that SF used to be rare. I recall when SER had a handful of trains classified as SF: Gitanjali, Coromondel, 1dn/2up Mail (now 12809/12810) and a few others.
Now, the roles are reversed. IR hasn't brought back Kurla-Shalimar Express back either.
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Its become a money making scheme, without overtly increasing fares... just add surcharge.