If my math is right about 20% of TX energy generation is renewables, wind and solar. You think had having that capacity in NG plants might have come in handy? That is what happens when you let freaks and geeks of the Austin type call the shots.
To keep up with EPA regulations, ERCOT shut down 5,000 MW of coal generation in 2018 alone. And of course built wind and solar to obtain green credits and tax incentives.
Coal is nice because you can have a large stockpile waiting for these events. Natural gas is limited by the pipeline, and I guess in Texas a certain percentage of the gas must be used for heating folks’ homes when they want to. Which makes it unavailable for electrical generation.