Solar being cheaper than nuclear makes it a foregone conclusion for daytime electricity supply.

However the direct comparison you were making in the first paragraph of your original post between nuclear price and solar price is nonsensical because they're not in direct competition with each other. Nuclear satisfies a slightly different use case to solar.

Nuclear instead is in direct competition with sources that are capable of providing base load power such as gas and solar+storage. The only meaningful price comparison is between nuclear and these other sources, since we need to decide if the stack is going to be solar+storage, solar+nuclear, etc.

Comparing solar prices directly to nuclear prices without considering the whole stack is just a meaningless comparison.