"Ask any climate wonk what’s holding back clean energy in the U.S. and you’re likely to get the same answer — not enough power lines. "

I have never read about problems with not enough power lines, its always about all other other factors related to inconsistent production. A power plant given coal or natural gas or other fixed inputs produces a set amount of power. But 1 huge unexpected wind gust and lines can blow, and someone please monitor all those pesky clouds around the solar production because we need at least 5 minutes to get the coal plant producing.