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.