If you read past the public/gov't support for Nuclear in the article (the "Declining Options" section, link repeated for convenience), it implies that even China, whose multi-plant build plan should have ensured declining costs and on schedule builds has been experiencing unplanned cost growth and schedule delays.

https://www.technologyreview.com/s/612564/chinas-losing-its-...

The economic comparisons are ending up that Renewables and even Renewables+Storage is much lower to even costs, at a much lower risk profile. And if you watch energy company investments in renewable and divestment in nuclear projects - the companies studying the matter in detail seem to be choosing the same direction.

It's not just current costs, it's the rate of change in costs. Renewables and storage are declining in cost rapidly, and any plant built to today will be competing in 10 or 20 years with frightening (for them) cheap competitors, if the trends hold up.