You'll find companions wherever you go, when you travel in Trains, family or solo.

Simple. If any Shatabadi Takes are replaced by VB trainsets, a Large no of LWSCZAC coaches will be released.

Now Normal Overnight Trains have a large no of AC coaches, they can absorb coaches freed from Rajdhani trains.

But,...
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Daytime Express trains usually have a very limited no of AC coaches, and they will take a long time absorbing the AC coaches freed from Shatabadi trains.

Also LWFCZAC are used in a VERY LIMITED no of non Shatabadi/Tejas trains like Jaipur DD, steel Express, etc.

* NDLS-BCT/HWH routes which are being upgraded for 160kmph and the target date for the completion of this job is march2024 which matches with the given production schedule i.e. 2022-23, 2023-24
* Allotment of 160kmph Tejas rakes on priority to Rajdhanis of above 2 routes (i.e. Mumbai/AK/Patna/HWH/Agartala Rajs) is inline with above
* By march'2023 we can expect a substantial portion of the Mumbai & HWH Rajdhani routes routes to be fit for 160kmph train operation and fully ac premium trains Raj/Saht/Duro/HS operating at 160kmph on the upgraded stretches. Non ac...
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coaches of Duronto/HS trains should be first replaced by AC3E to enable 160kmph operation.
* IR should run a large number of SF trains at 160kmph on the above 2 routes by replacing the non ac sleeper coaches with AS3E coaches which are fit for 160kmph operation. A large number of AC3E coaches shall be required.