Earlier quoted context omitted.
Battery cell production alone is massively expensive. The expenses in setting up a production line is counted in the billions. So the only way to start fresh here is to raise billions in capital. Unless you're Volkswagen or something, when you could invest billions in an enterprise like this one.
Volkswagen has their own plans with its subsidary PowerCo, and since EV adoption is slower than expected, they may (partly) drop Northvolt in favor of PowerCo. Interestingly they canceled their plan for a second battery plant in Germany due to high energy costs. Regarding Germany: I still do not understand how you want to electrify everything, reduce CO2 emissions, and then shut down fully working nuclear power plant…
Yes it is a stupid decision, but your timeline is out a little - 2011 is when they decided to shut down the power plants, the energy crisis was 2022. The amount of work that doesnt get done when you are 2/3/4 years from end of life makes reversing the decision on the day of shutdown not as easy on the ground as it is from an armchair.