The far-left are not the cause of the nuclear close down, nor are they unilaterally holding the government hostage in this area.

The centre-left party made the agreement with the power companies in 2019 when they were not yet in coalition, for economic reasons.

The far-left, now in the coalition, does consider nuclear a red line. It is unknown what the cost of crossing it would be. But I believe it's irrelevant, because if the centre-left party would be governing alone, they wouldn't walk back the agreement now. No matter price of oil, the investment in nuclear has a too large price-tag, and would take way to long to reap any benefits. If any - given the current progression on renewables.