Not a technical problem, it's just that long term projects with large upfront investments end up costing a lot within the socio-economic system we have. These are societal choices. Do we collectively want low-carbon electricity, with proper regulation and independent safety authorities, or do we want neoliberalism, small government and free markets... https://www.nao.org.uk/wp-content/uploads/2017/06/Hinkley-Po...