Solar and wind are displacing coal
right now, watt-hour for watt-hour. Each additional panel and wind turbine wired in means less coal burned,
right now.
Nobody but you is talking about coal and nukes being interchangeable. But it is a fact that both boil huge amounts of water for steam to drive through huge turbines that need frequent, expensive maintenance, and need elaborate cooling apparatus to turn the steam back into water. Both have large, unavoidable operating costs that make them uncompetitive vs. tech that does not.
Coal has the extra cost of mining and transporting coal, and environmental catastrophe. Nukes have huge corruption overhead and life-cycle costs, and long, long delay between spending money and getting any power at all out, with a strong likelihood of never, instead, plus risk of regional disaster.
It is not a fact that both renewables and nukes are needed. We already know that nukes are not needed. (Rather, you wish that nukes were needed.) With every nuke project that collapses, it gets better that it was not anyway needed. What is tragic about the failures is that so much was wasted that could have been used to build out non-dead-end generating capacity.