There's nothing to stop hyperclouds from finishing it with temporary nat gas behind the meter now and striking long-term power purchase agreements that fund extra utility build-out.
They're not doing that because (a) it costs more and (b) nobody has made them.
Hopefully that'll change with a bluer Texas, new Congress, and more assertive municipalities.
There's a trivial path to win/win here, if the companies were universally required to enter into sustainable deals (both financially and environmentally). Even playing field nationally = no particular cloud wins by finding the rube locality that will accept a bad datacenter deal.