They are trying. Microsoft wants to star the 3 Mile Island reactor. And other companies have been signing contracts for small modular reactors. SMRs are a perfect fit for modern data centers IF they can be made cheaply enough.

Wind, solar, and gas are all significantly cheaper in Texas, and can be brought online much quicker. Of course it wouldn't hurt to also build in some redundancy with nuclear, but I believe it when I see it, so far there's been lots of talk and little success in new reactors outside of China.

I think this is right- data centers powered by fission reactors. Something like Oklo (https://oklo.com) makes sense.