I never understood the argument that nuclear takes too long, so instead we implement new technologies that have never been done at scale. What if we run into u

I never understood the argument that nuclear takes too long, so instead we implement new technologies that have never been done at scale. What if we run into unexpected problems with energy storage that push their timeline out even longer than 30 years? Seems better to do both, and accept the risk that we paid for too much clean energy in the end.