Well, the point of this thread is that's only true until a sufficient level of availability is required, and then nuclear (and fossil thermal plants) all of a sudden become a viable option again.

Nope, virtually all nuclear advocates call for combined renewable/nuclear grids.

Nuclear and reliable renewables for base load, intermittent renewables for intermittent load where and when it matches.

Wind/solar are not cheaper. Per kWh they are more expensive. Thanks to China, they are a lower and smaller-grained capital investment.