Nuclear can't be shut down / turned on on a short term basis, there is a lot of inertia. It might be a solution for seasonal issues only, but in Germany, there's usually wind during the no-sun season, and sun during the no-wind season.

Sun can be predicted. Not sure what the reaction time is and how far ahead we can reliably forecast wind, but even if there is zero response possible to wind fluctuations that still seems like a win. Afaik fuel is also not the biggest cost in nuclear so estimating on the high side might not be an issue (but this is admittedly where I veer into speculation).

Uranium (as a nuclear fuel) cost may never become prohibitive, however ore grade may prove a major challenge as its decline leads to more emissions: https://news.ycombinator.com/item?id=30660554

With such a (realistic) approach nuclear is condemned because its production costs (LCOE: https://www.lazard.com/perspective/lcoe2020 ) are higher than renewables' (and the gap is enlarging). Therefore renewables will be preferably used. Nuclear gets more expensive as it is more sparsely used: this feedback loop will widen the gap.

https://www.youtube.com/watch?v=udJJ7n_Ryjg

With time renewables production will get less an less intermittent thanks to a more and more adequate spreading, to a mix (wind, solar...), to storage (hydrogen...) and an overly-expensive nuclear will become useless.

https://www.imperial.ac.uk/news/180592/european-cooperation-...