Insurance and regulatory hurdles are far higher than contracts selling future electricity customer purchase agreements and likely to doom almost all new nuclear projects in the US as they have for the past 50 years. I don't see why an amoral customer would care about the specific source power as long as it's cheapest, but even a socially-conscious customer would probably be okay with renewables if and when they are generally the cheapest option. Perhaps there are a handful of specific datacenter locations and requirements in particular areas that would be better suited to geothermal or nuclear.