That isn't over construction, that's under production of electricity. My city has a literal fuck ton of manufacturing all over and we have no rolling black outs and very little outages even with most of the lines above ground. We do get our power from a nuclear plant so that definitely helps.
A lot of these energy issues are hyper local. Texas for example is the worst in the country for maintenance, price, outages, etc and it's not solely because of the weather.
That's kinda crazy. I always thought that a thing from the movies. In 40 years i only remember 3 blackouts, and two of them were when i was like 7 and it had just an absurd amount of snow.