Wind turbines are, in fact, getting larger because technological improvements coupled with increased size mean that each turbine can produce more power and / or take advantage of lower wind speeds. (cityroom.blogs.nytimes.com)
It's a timeless design that has aged well, and its aerodynamic cleanliness ensures stability and low wind noise at speed. (cnet.com)
Advances in wind turbine design since then enable turbines to operate at lower wind speeds, to convert wind into electricity more efficiently, and to harness a much larger wind regime. (earth-policy.org)