Wind energy is mechanical,in 2021 it costs around $0,06 per kWh, it will not get cheaper than $0,035 per kWh (quote Saul Griffith of Makani power). Solar photovoltaics cost $0,01 per kilowatt hour in 2021 and will get two orders of a magnitude cheaper in the next decades. This cost projection is based on physics. Why would you be interested in more expensive sources?