Sorry but your link looks like a "bullshit jobs" industry rag to me. They are making a mountain out of a molehill, there is no problem to solve. Electrical machine rotors can minimally comprise cheap iron and copper. I know because I’ve designed the things, with historical patents in ferrite based power components to prove it. Like I said I am no fan of windpower, only solar, but I fault your argument because misinformation about anything around “Renewables” just confuses most folk to the point of giving up trying to make sense of it. I would ask you what you want to get out of it, a fixed world, or a career?

Can’t have both if the career is in a bullshit industry, unfortunately.