We also have a lot more growth in the past few years than most other places, both in relative terms, and in absolute (big state + high growth introduces more absolute friction than small state). Demand is forecast to rise over 20% from 2024 levels vs. an American average under 5%: https://www.eia.gov/todayinenergy/images/2025.07.31/main.svg
We have high power demand in both winter and summer: in the latter, air conditioners use a lot; in the former, about half of Texans heat with electricity because we have less cold and so less usage of cost-effective, grid-preserving furnaces.
Texas has been building a ton of wind and solar to supplement generation capacity and is taking some leadership in the next-gen nuclear stuff for a reliable base load, but in the mean time the shortage of CCGTs is going to bite in a state where demand goes up this much, this fast. SB6 passed this summer also should help with reasonable control and oversight.