What part of the Concrete base is renewable? Landfill to cover the obsolete blades? You still have to make more fresh concrete to use as a base along with all the new steel to hold it in place for each replacement windmill in a new stable location, which are all made with base load coal / gas energy. But yeah, "renewables" are so cheap. Meanwhile, in the real world Copper producers and other rare earth miners will be running out of the available materials due to the increased transition to EVs and other "renewable" tech. So when it comes to supply & demand that can only mean one thing - Prices are gonna skyrocket.
Cheaper? No one ever said that Chris Bowen had a brain - ever!