The head of the Australian energy market operator AEMO, Daniel Westerman, has rejected nuclear power as a way to replace Australia’s ageing coal-fired power stations, arguing that it is too slow and too expensive. In addition, baseload power sources are not competitive in a grid dominated by wind and solar energy anyway.
We do though. The cost is really land and rust. Iron oxide batteries are cheap and long lasting but low power density. Perfect for grid storage in a lot of places.