नहीं कोई गम, रेलवे से हैं हम - Aman

Anyways, I trust what I get to see. I am a WAP-5 lover as well but that doesnt mean I stay in fool's paradise w.r.t it's abilities or try to fool others too about the same.
I have been hearing the same from WAP4 supporters too, WAP4 still has abilities to haul rajdhani/shatabdi. they didnt mention abt WAP-5's ability there. Here also, the same, you have mention about P5's ability but you didn't mention about WAP4's ability did you? :D
You said GZB has been shifting the link from WAP-5,s to WAP-7,s...
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because at the time of departure this is the suitable loco which is available for operation.
I also talked about preferred loco or suitable loco not about abilities of loco.
Preferred loco as in WAP7 which can give 130-140 mps as a WAP4/5 with Rajdhani trains. But diference, is WAP7 has better accelerating ability than the other two and also are better with long rakes. Now, better acceleration is needed as the routes are now congested especially routes like NCR/ALD which have maximum no of Rajdhani passing through it and No. of coaches in Rajdhani has increased, from 17 icf/LHB rajdhani to 20-21 LHB coaches, again that makes WAP7 most suitable.
Reality is before us, WAP7 has not only replaced WAP5 of BCT/AK Rajdhani but also replaced WAP-4 of DBRT/RJPB/BBS Rajdhani.
WAP-5 was regular link of BCT Rajdhani. It was not a case of whichever loco GZB ELS/NDLS trip shed had i.e wap5/7, that would be given. But for once, WAP5 experienced wheel slipping due to drizzling weather n cudnt maintain 130 mps with 20 coach load. Deliberately and immediately, the WAP-5 was replaced by WAP-7.
That system of which ever loco is available shud be given, is still prevalent for Ranchi/MAO/TVC Rajdhani. But there have been clear and deliberate replacements of wap-5 by wap-7 for 130 mps trains like MAS-NZM Drnt, PUNE-NZM Drnt and BCT Raj.
While 110 mps trains like nzm-pune is given wap5, which runs ontime even when a WAG7 is given.