When the wind stops, they all stop. This happens, at least once, almost every day, at almost every wind farm in the world. A couple of years ago, I spent some time near one of America's most reliable wind farms. Every day, I observed periods of time when none of the turbines were turning. There were patterns to this, but it was far from consistent. I never saw all of the turbines turning, because some were always broken.
Wind turbines also have problems with high winds. They often have to be shut down just when they should be generating the most power. The systems which protect them from high winds often fail, creating very dangerous situations. There is a spectacular video, from Holland, of a major wind turbine experiencing a break failure during high winds. The turbine threw one of its 60 foot long blades about 1/2 mile. Fortunately, nobody was hurt, but it had deadly potential.
Define “often fail”. One could also say nukes often fail there’s one that failed in Russia ya know.
You have just repeated the talking points against wind.
In fact wind power is much better in actual experience than the black picture you post. The viability of wind power is well proven.
larry