Sir, your response is not very civilised!
Short term, if you had 10GW of controllable nuclear, you will have to replace it with 10GW of another controllable source. As long as you don't have huge energy storage, replacing reliable and controllable energy source with something not controllable is pure fantasy. In our world this is typically replaced by Gas or Coal. Maybe in a future world we'll have plans to replace one controllable power plant with renewable and storage. BTW I'm mostly speaking about capacity and infrastructure, for sure you are free to not use an infrastructure at its maximum when there is wind or sun but you still need to build it, maintain it, buy and store gas coal or whatever...
Solar/wind is far from ideal, requiring more cement, metal and other materials but also more space than other traditional concentred power sources and by multiple orders of magnitude. You also have to take into account new infrastructures for energy storage.