Energy use in Sweden peaks in the winter, and especially a few extremely cold days. The sun literally doesn't rise in the northern parts, and the coldest days have almost no wind (and frankly it's not very strong overall either). This and last year, Swedes are stocking up on firewood, and it's not for cosplaying reason. Several knowledgeable people predict rolling blackouts this winter.

I would love renewables as much as the next guy but there's simply not a chance that Sweden could sustain a winter with the current supply. Importing helps with survival but the prices are insane, since their neighbors are cold as well. Dispatchable or baseload energy is necessary, and thus nuclear is the only carbon neutral option. Sure, it's more expensive than solar panels midday in the desert, but the comparison is irrelevant.