Unfortunately, at that time, they didn't realize that they would have to subsidize coal and nuclear: "Pay a Premium" for generated electricity if coal and nukes inventory fuel.
Ten years from now they will have to start subsidizing natural gas. And 10 years after that, they will have to start subsidizing oil.
For now it depends on the transmission lines. Texas rate payers paid for new wind lines(2014) and wind is on the verge of replacing coal.
Now they are just getting the regulatory authority for building the new interstate HVDC transmission lines so the wind states have access to other markets.
Wind-Energy Sector Gets $176 Billion Worth of Crony Capitalism
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That’s an astounding level of subsidy. In 2014 and 2015, according to the Energy Information Administration, during times of peak demand, the average wholesale price of electricity was about $50 per megawatt-hour. Last winter in Texas, peak wholesale electricity prices averaged $21 per megawatt hour. Thus, on the national level, wind-energy subsidies are worth nearly half the cost of wholesale power, and in the Texas market, those subsidies can actually exceed the wholesale price of electricity.