It's weird that the link provided talks about El Paso failing but El Paso outages were as far as I can tell limited to short term outages similar to most other parts of the country under similar conditions. https://www.elpasotimes.com/story/news/local/el-paso/2021/02...

West Texas near El Paso is not on the ERCOT grid and they winterized properly after the last big snow storm so it's absolutely possible to have been prepared for this in Texas.