It might in the future turn out to be more efficient with a "few" reactors than, say, lots of batteries and wind turbines and solar panels, from a resource pers

It might in the future turn out to be more efficient with a "few" reactors than, say, lots of batteries and wind turbines and solar panels, from a resource perspective. But I think not even that will come true, if we optimize stuff enough, which we will have a long time to do before fusion is here.