You're not wrong. One of the newest reactors to come on line is reactor 3 at Plant Vogtle in GA. After as much as 5 years for the approval process, the reactor broke ground in 2009 and didn't start producing power until 2023. That's just shy of 2 decades from start to finish. As much as my wind and solar idea is flawed, nuclear is as much of a non-starter. These folks may want to open their data center a little sooner than 2045.