Comment by pjc50

There's a property called "learning rate", which roughly measures the extent to which doing some kind of project more makes it cheaper. Renewables have hugely benefited from this at every level, from manufacture to installation.

Nuclear, somehow, exhibits a negative learning rate: the more nuclear projects you do, the more expensive it gets. https://www.sciencedirect.com/science/article/abs/pii/S03014...