@kravietz the article talks about per-blade power supplies, which I think eliminates the possibility that it's about head turning
Even if you can't turn the head, you can always turn each blade individually into the wind (though this might be out of the range of is normal motion).
@robryk
I suspect the definition of “neutral” depends on the wind direction. If you have wings turned at 0° against the land surface it will only apply to two wings at any given time, while the other two will be angled at 90°. These will start getting pushed when the wind bearing changes so you need to turn the whole head and I guess that requires much more power than turning wings 🤔