I think you are vastly overestimating the productivity of renewables right now. They are a smart investment to augment what we have, but to take non-renewables offline and to build enough renewables to reach the levels of modern nuclear, we will need an additional decade… Assuming the tech in renewables continues to make massive gains. There just aren’t enough skilled workers, and you can’t run these people non-stop to produce enough windmills to meet demand.

Renewables are only 20% of the US total, nuclear is 18% (and the US is the highest producer of nuclear worldwide at 30% of the world’s total), and the remaining ~60% is fossil fuels.

https://www.eia.gov/tools/faqs/faq.php?id=427&t=3