This has some useful charts.

It shows that nuclear still has economy of scale to improve, if we give it the chance.

The big difficulty for nuclear is public pressure/fear of accidents. People are much more afraid of "big scary nuclear accident" vs. probabilistic deaths caused by air pollution, even if the deaths from the latter is in the tens of thousands and the former is in the dozens.

That fear of public/policy backlash makes raising capital in order to actually benefit from those economics of scale very difficult.