It was baseline coal power that ran the country (or at least a significant part of it) when the last winter storm hit.
It wasn’t the frozen and furled windmills, it wasn’t the snow covered solar panels.
It was good old fashioned coal fired thermal steam plants that powered the country.
If it had been “renewables” rather than coal then fully half of the US would have been in the dark (and cold) during the last winter storm.
One of the beautiful things about coal is you can make an enormous pile of it through the spring, summer and fall and it happily sits there waiting until you need to use it.
Natural gas production that fed the mid-Atlantic area shut down during one of the last bits of weather and the line pressure suffered. Gas turbine “surge” capacity goes to zero if there is no gas pressure due to inclement weather.
And coal plants don’t freeze, or need to be furled because of ice, nor do they get covered by snow and stop making electricity. They just keep on burning and turning.