> Germany shut down all their nuclear plants about 10 years ago...

"Nuclear power in Germany accounted for 13.3% of German electricity supply in 2021, generated by six power plants, of which three were switched off at the end of 2021, the other three due to cease operation at the end of 2022 according to the complete nuclear phase-out plan of 2011." https://en.wikipedia.org/wiki/Nuclear_power_in_Germany

And spot market prices last December when all six plants were running at full power were as high as they are now. This has nothing to do with nuclear energy. It's demand pushing Germany to run more expensive power plants, which in turn dictate the price of electricity for all power plants, so pointing at the electricity mix of Germany is a waste of time.

> Finland invested in nuclear and is bringing their latest plant online this fall.

How exactly has a not yet operating reactor that is vastly over budget and time any influence on the current price though?

It effects the futures which effects any fixed price contract they might want to try and negotiate. Going for spot price is very risky at the moment with what winter is looking like to be.

Also there are the 4 existing reactors that are running just fine at the moment. (at this moment production is over 25% nuclear)

1. The Hetzner article is about future prices

2. Supply and demand

It didn't take a genius even 10 years ago. That decision to get out of nuclear power, based only on emotions, was a grave mistake.

Not that I know of. We still have 3 nuclear stations in production. One of them is Isar 2 next to Munich. They will stay in operation until the end of this year.

That said, there are debates right now to prolong their operation until another few years. But that has other constraints.