Those NFR trains are mostly long distance ones covering 3000 kms or even more and their average speeds are bordering 55kph and such a long journey they are bound to get late so maybe they were struggling to maintain 55 average speed hence IR decided to convert to M/E so that passengers won't have to pay SF surcharge.
Also trains via SECR running terribly late they too should be converted to M/E category till the issue is solved.
The only surprise is Purushottam express.
please wait...Translate to HindiWoh NFR trains mostly long distance wale hote hain jo 3000 kms ya usse bhi zyada cover karte hain aur unki average speed lagbhag 55kph hoti hai, itni lambi journey ko late hone ki sambhavna hoti hai isliye shayad 55 average speed maintain karna mushkil ho raha tha isliye IR ne decide kiya ki M/E mein convert kare taaki passengers ko SF surcharge bharna na pade.
Aur SECR ke trains bhi bohot late chal rahe hain toh shayad unhe bhi M/E category mein convert kiya jaye jab tak samasya ka hal nahi nikalta.
Sirf ek surprise hai Purushottam express.