Nuclear power is indeed quite cheap, especially if the operators have to pay neither insurance nor damages for the potentially catastrophic consequences of accidents. And most operators have totally understated/underestimated the cost of demolishing plants at the end of their lifetime.

In Germany in particular, the biggest actual problem would be waste storage. We just don't really know were to put it, and even if we knew we couldn't agree where.

So, in the meantime, until we know with absolute certainty what to do with it (so please no pie-in-the sky reclamation ideas or unproven reactor types nobody can build commercially), I prefer not piling up more of that stuff.