It was also 10 years ago that another *massive* cold spell hit. Early February, 2011. https://www.weather.gov/media/epz/Storm_Reports/Cold11/Feb2011ColdWx.pdf
The central area of the Texas-New Mexico border rarely gets *really* cold; the jet stream tends to steer things away. (The coldest we got over the last few days was, IIRC, about 18 above, and the coldest high temp was 30ish.) In this cold stretch in 2011, we had a couple days with single-digit HIGH temps, and IIRC the coldest pushed 10 below. That's insane for us. And during this, businesses and the university were closed to save heat. There were rolling blackouts, but never more than a couple hours, IIRC. And not for more than a few days.
BUT, Texas had it MUCH worse. Power plants failed and power problems lasted MUCH longer. And it seems Texas did NOTHING to improve the situation.
Yes, well, they darn sure BETTER start working on fixes. Because from what I've heard, this could *easily* happen in any winter.