and 3) a total con - unpredictable output, which means they need conventional generators on standby 24/7 for when the wind stops blowing. Running on standby consumes fuel for no output at all.
And think on - in winter when it's really cold, that often results from high pressure, so no wind. In summer when it's really hot, that often results from high pressure ...
So when people are running heating or air-con at max, there's nothing from the windmills