The week previous to this freeze it got close to 70 and I actually saw people walking around in flip flops.
The last time we had plunging temps hovering around 0 degrees for more than a week was over 40 years ago.
Usually our winters consist of one day may dip to 19 and then go back up to the 40s. We may get snow but it is usually gone by that afternoon or the next day.
Our power grid can't rely on wind and solar because if it did we would have no power in the summer to run our air conditioning.
The dealeo is our power stations need better insulation from the sustained freezing temperatures.
Your assessment is correct.
Even the coal and gas plants in Texas are not built for this.