It is hard to argue about energy cost in Germany, because all energy sources are a mixture of privately financed and public/state-subsidized, but always in different, complicated and frankly weird ways. Things are easier to see in countries where either practically everything is done by the state (e.g. France) or everything is more free-market (e.g. the US).
Green Party activists often demonize nuclear while calling for renewables and their inevitable companion of gas peaking plants. Activists pretend "renewables + gas" is green and clean using insane cognitive dissonance, while claiming that renewables can power 100% of a country's energy needs -- a farcical claim not supported in any country.
Maybe Germany could go energy martial law, that to build and deploy wind/hydro/solar/etc production plants to shut down their fossil fuel energy production plants. In the meantime, if France is ramping up on nuclear energy, Germany will get some from the EU electric grid.
It’s mostly the opposite, though. France is heavily importing German electricity.
Whatever, who knows how it will end up.
With nuclear, every kWh generated incorporates the cost of decommissioning, storage, truly baroque safety compliance, and all the rest.
With coal, every kWh incorporates the cost of… coal. What’s the plan for the radioactive ash? Dump it. Somewhere. Wherever. What’s the plan for the atmosphere? Screw it. What’s the plan for decommissioning? File for bankruptcy and let the state deal with it.
The renewable energy transition was blocked and delayed by the same Merkel govt. Germany was once leading in wind and PV energy and all those industries were destroyed and almost 100k jobs lost. 60bn subsidies per year go to fossil fuel companies including coal mining and burning. Often under the disguise of job retention. All through industrial lobbying and strong unions in the fossil fuel industries.