“...change the weight of the oil in the reduction gears every winter...”
With the installation of “cold weather packages” which provide heating to turbine components such as the gearbox, yaw and pitch motors and battery, some turbines can operate in temperatures down to -30C.
All common sense engineering to overcome extreme variables.
Still, wind and solar are a joke.
I don’t think the blades have anti-ice, that is a problem.