a superfast, an AC express or a GR can very well solve the purpose instead of having durantos, moreover they won't be non stop anyways, they will have Tech halts. So why not make the'm commercial halts also. It will have a better impact and moreover revenue generated will be much more than point to point trains. for example many people travelling upto mgs/gaya/dhanbad will book their tickets in hwh duranto upto hwh, whereas if the train stops at these places, railways can earn double from a single seat..