So I kind of want to split it halfway between you two: The reason all the regulation exists is because of how dangerous it is, the reason Nuclear is so expensive and time consuming is because of regulation. I reckon you could basically make a super dangerous Nuclear plant for not much more than a coal plant and in the same time frame. So, you could say it like "nuclear is too time consuming and expensive to be relevant", or "nuclear is too dangerous to be relevant" and they're both basically saying the same thing.