That's a good point but how many years have coal burners been in development? That is the advantage they have in performance---long term development.
Development has nothing to do with it. Electricity is used as its made, and load demand is what drives it.
When the demand increases the electricity must be present then, and quickly or the grid voltage and frequency sags which can lead to blackouts.
Wind powwr cannot meet that demand, you may have it today, but tomorrow it's not making any power.Gnerally the peak wind seasons are the Spring and Fall, thats when demand is at it's lowest due to mild temps.
Wind power has a place, but it's not going to replace the big baseloaded plants. The reason coal plants are closing now is due to Natural gas being cheap, not wind or solar.