The science is in:

The analysis of these two alternatives shows that Germany could have reached its climate gas emission target by achieving a 73% cut in emissions on top of the achievements in 2022 and simultaneously cut the spending in half compared to Energiewende. Thus, Germany should have adopted an energy policy based on keeping and expanding nuclear power.

https://archive.ph/zTReX

https://archive.is/Duk35

They really should do it. The most expensive part of the facility, the facility itself, is already constructed. Even if they need new reactor vessels, it'll be more affordable than building a whole new plant.