I’m aware of three areas in CA that have/had windfarms: the hills near Benicia (NE SF Bay Area); the Altamont Pass (between the east SF Bay Area and the Central Valley); NE of LA at the West end of the Mojave Desert. All three are about as good as it gets in CA when it comes to being continually windy. Trees near the Benicia site grow at a slant! The windmills near Benicia fell into disrepair in the early 80s and were removed by 1990. Quite a few in the Altamont Pass are operational; many are not. They seem to be falling into disrepair. I can’t speak to the state of the windmills in the LA Area. There are numerous problems with the things, but the worst is that they are intermittent (worse than one might think, as they don’t work with slow wind, and cannot operate safely if the wind is too strong). The Enviros no longer like them because they kill birds. Also, they occupy lots of land and need vehicles for installation and maintenance.
The problem this Danish problem is facing, the real long-term problem, is that wind power is not economically viable. Heavy government subsidies and hidden subsidies mandated on utility rate payers create an illusion of such viability, but hard economic times merely expose the fundamental non-viability.
Solar and wind power are only economically viable in exotic applications that are cost insensitive. That is not likely to change in the next 5 decades, maybe not in a century, and maybe never. Before anyone asks, I have no ties - personal or $$ - to oil, gas or hydro companies. I’m just tired of funding hype and being realistic.