South Australia also has third highest electricity costs in developed world and on the way to become the first. [1] As I mentioned, burning money. Serving economy's energy needs assumes serving them at a price that doesn't cause economy to seize up.
SA also has some geographical advantages to wind power, which aren't present elsewhere, and still their wind farms operate at around 1/3 full capacity.
And as far as I can see, it is driven by massive government investment and regulation. Which again makes one doubt the viability of the idea - if it were that good, why would it be impossible to find someone willing to invest in it without forcibly taking money from people and prohibiting them from making choices according to their preference?
[1] http://www.adelaidenow.com.au/news/south-australia/power-pri...