But what if it turns out we do need it in 10 years?
That’s the point, we likely wouldn’t have any new nuclear power plants in ten years, even if we started planning them now. The one they are building in the UK was started somewhere around 2017 I think and maybe, fingers crossed, it might be finished by 2029. Right now the estimated cost is around £46 billion, up from originally about £23 billion.
That’s one plant. We need many more for any relevant effect. Not even starting on the fact that nuclear energy is very inadequate for balancing out short term differences in the grid since you can’t just quickly power them up or down as needed.
I also hate discussions with people who miss my point and argue against things I never claimed.