The Vogtle 3 and 4 reactors were delayed again. These two conventional reactors were started in 2013 and will cost at least $30.34 billion. https://www.world-nuclear-news.org/Articles/Further-delay-in-startup-of-Vogtle-AP1000s
Nuclear bad news 2: Small modular reactors, pitched as a low-waste future version of nuclear power, are actually likely to compound nuclear waste, according to a peer-reviewed analysis.
SMRs have some economic problems as well. https://arstechnica.com/science/2020/11/first-major-modular-nuclear-project-having-difficulty-retaining-backers/
The area of uncertainty is lifetime extension for existing nuclear power plants. Unlike New construction, just keeping these open is cost competitive with new renewables.
(see yellow dots on thus graph)
Here's an informed skeptical take from Amory Lovins on just how long that can last. https://www.energyintel.com/00000180-f7a8-d67b-a3cd-f7faad650000m
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