On your #2 - I'd bet that the parts of the grid connecting to wind farms are only spec'ed and built to handle (say) 75% of the absolute maximum power which the

On your #2 - I'd bet that the parts of the grid connecting to wind farms are only spec'ed and built to handle (say) 75% of the absolute maximum power which the wind farms could produce, during rare optimal-wind events. Otherwise, you're adding full-price/rare-used capacity.