As a start to discuss cost, here is Lazards' analysis about the cost of power generation: https://www.lazard.com/media/5tlbhyla/lazards-lcoeplus-june-...
"On an unsubsidized $/MWh basis, renewable energy remains the most cost-competitive form of generation."
Edit: In other news, and as usual for nuclear projects, EDF had to increase their cost estimate of new reactor again: https://sightlineu3o8.com/2025/12/edf-raises-budget-for-new-...