Agreed, but we aren't talking about having to completely rebuild plants are we? I don't think we are even talking about replacement lines. I think they are talking about additional lines and some new control equipment.
How much equipment is required to control the grid at each plant and prevent one line going down from taking them all down? My guess is it's a couple of relays, maybe a new computerized control system for each plant. But it sounds like they already have invested in such control systems, and they simply need to make sure everybody is up to the current state of the art.