https://gicon-hoehenwindrad.de/ They test-building a 380m wind turbine in such a style now.

I know it's a test project and one shouldn't be to stoked about a test project, but for the last year I have again and again searched for updates about it. Unfortunately, they keep it (understandably) low. Let alone the story of the 90+ year old engineer that envisioned such a project (and they are only implementing 20% of it) is so awesome. Looking forward to when it finishes and hopefully changes our view on wind power for good!