Per unit or amortized? My impression was that long-distance high-voltage transmission lines can be expensive and logistically challenging to get built, e.g. NY/

Per unit or amortized? My impression was that long-distance high-voltage transmission lines can be expensive and logistically challenging to get built, e.g. NY/Quebec line thing, even if it eventually evens out. That's less relevant if we're talking the greening of already-established infrastructure, but the hyper-local nature of some forms of renewable generation could be a big advantage in physically isolated areas with rapidly growing populations, like right now in much of the mountain west. Maybe it'd let you get away with something like two high-cap long-distance lines instead of four, even if total grid isolation is unrealistic (and probably undesired) - i.e. if we're stuck building new infra anyway, may as well take advantage of new technologies to minimize the expense and impact of that new infra while maximizing effectiveness.