Texas state have some of the lower electricity prices in United States so I am not surprised to see this news, but there are other benefits including lower taxes for moving Bitcoin mining operations there.
I checked out electricity prices in other US states and Florida also have decent price of average 11.65 cents per kilowatt hour, compared to Texas 11.36 cents per per kilowatt hour in May 2021.
The national average electricity price is 12.07 cents per kilowatt hour, but there are some extreme places like Hawaii with around 30.55, Alaska with 21.32 or California with 21.43 average price.
Lowest electricity is in Oklahoma 8.92, Louisiana 9.52, Arkansas 9.42, Missouri 9.38, Nebraska 9.41, North Dakota 9.44...
https://www.electricrate.com/electricity-rates-by-state/