Citation needed, https://www.wwindea.org/wp-content/uploads/filebase/small_wi... (an apparently pro-small publication) states the total worldwide number at less than a million in 2015, with just 17000 of those in Germany. The installed total capacity of small wind in Germany is stated at 26 MW, which is equivalent to a modest wind farm of six 4.4 MW turbines.

Oh, and I do see plenty of small wind generators installed, they just never move because they are merely bought as futuristic architectural ornaments, not to make a difference. They probably run until the first time they require maintenance, then the novelty has worn off.