Price per Wh plays no role in the coming decades. Solid fuels can become x10 or x100 more expensive as they deplete. So the now extensive nuclear can become relatively cheap.
The globe must change its behavior NOW: electricity prices at night, under shade or without wind must become very extensive because they need extensive tech (batteries, nuclear, fuels).
If I were a regulator for a day I would strive making fossil fuels and night elecricity x10 more expensive and leave the market regulate by itself. In ten years I would make them x10 once more.