Rugged individualism.
No matter the nuclear system setup, you are on a grid. Grids are risky. Consumers willing to pay more will force you to conservation programs like the grid system in California did to their customers. Terrorists, looking to take out power in a region for its disruptive value.
The new tech solar roofs can supply the household needs, maybe even the needs of your car, if it doesn't have a solar roof. So why bother with nuclear plants and grid systems and all the risks that they represent for abusing customers, taking over territory.
No dinosaurs in my future. LOL