NDLS/DLI/ANVT to WB/JH/BR/UP and vice-versa doesn't have dearth of passengers. That is the reason, PT Quota too gets exhausted on this sector, pretty soon. So, money is never a factor on this sector. If service would be there, there would be takers, IMO. Yes! It would be a tedious task to sit for almost 16 - 17 hrs but, we still might see people using that connection( if introduced).