Most commercial windmills would come to a screeching halt. That's because they feed into the grid. They're designed to feed into a fully functional, working gri

Most commercial windmills would come to a screeching halt. That's because they feed into the grid. They're designed to feed into a fully functional, working grid. If the grid is broken then having random power inputs into it won't work. There would be no way to control the grid under that scenario. Windmills that e.g. farmers and other rural people install on their property would probably be OK. It should be easy to disconnect them from the grid and have them power local equipment. But without some sort of energy storage, it would be dangerous to try to operate on just windmill power. Too variable. Most equipment wouldn't deal with it very well. But there is one other strong positive I forgot to mention. PV power. That's becoming more and more available. Such a massive change in just the last few years. PV would let pockets of people do well. Also, having something like a Tesla car or Powerwall, coupled with rooftop PV, would be a game changer for those people. A setup like that could do pretty well if decoupled from the external power grid.