Can anyone tell me what is advantage of Humsafar Express (having only 3AC) over AC express with LHB coaches (having 1AC, 2AC, 3AC). I just don't understand why this new class of train like Humsafar is introduced. Those who like to travel in 2AC or 1AC won't get the option.and the fare is also not dynamic in AC express. I will always prefer AC LHB Express over Humsafar.