Poorva Express: हुगली सी बहती तेरी चाल है पूर्वा तू बेमिसाल है - Keshav Singh

I was just going through the admin note of this train which is as follows:
LOCO:
WAP#4 (PNBE-ALD) - MGS Shed
WDM#3A (ALD-PNBE) - PUNE Shed
WAP#4 Detached from front (Which become...
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Rear from ALD Onwards) & WDM#3A Attached @ Rear (Which become Front from ALD Onwads) @ ALD
Loco Reversal @ DD
Is this information is really need by passenger ?
What is benefit to passenger by this admin Note of engine detail please explain to me If possible?
In point of view of a user whether he comes here for detail of technology aspect of the train or for train schedule or train availability.
The engines can be change as per the requirement . How we can sure that this engine will only given to this train to all days? Any data detail in IR where we can find ?
How we can take admin note seriously as it is not from official source. Like train composition , etc. How we can assure that this are correct. For example suppose I tell you that this train has a composition after login and which may not be correct than what is the source to check that the information given by blogger is correct .
please explain as I got excited with this features like admin note for engine, train composition. etc..