It’s also an open question just how many of those costs are real and how many of them are political, regulatory, or otherwise artificial. Maybe nuclear is expensive because we’re making it expensive.

A data point in favor of this: Suppose there was a fast developing country that had the resources and requirement to build more power generation capacity than any other society in human history. Suppose, further, that this country was relatively immune to political concerns because it was governed by a technocratic bureaucracy. Just for the hell of it, let’s imagine that most of the techno-bureaucrats have some sort of engineering background. It so turns out that there is a country exactly like this, and their long term energy policy is to build a massive hydroelectric dam on the one place in their country that is particularly well-suited for it, and then build lots and lots and lots of fission plants and invest in fusion research.