That’s a backwards looking metric. You’re complaining that late 2000s renewable were expensive.

The problem with nuclear is that it doesn’t solve stability. When cold spells hit Europe the French exports turn into imports. So all the French neighbors needs enough backup capacity, generally fossil based today, to both make up for the French exports vanishing, they experiencing the same cold spell, and exporting to France.

Stick two French grids next to each other and they would quickly collapse due to how brittle they are.