thou shalt not question thy love for HVDC, or for Thyristors :P
what you mentioned in your third para is the same purpose for which non tarrif revenue department was setup, but difficult to say how much they can contribute (target is to have 15% revenue to come from there, which frankly is a tall order)
agree with you though, this is gonna be a long, long process requiring years to be noticeable. hopefully, sagarmala project will help bring some additional revenue too in future with lines like chiplun-karad, roha-dighi etc