WaPo has good article on electricity costs. More demand amortizes fixed costs of transmission & distribution over more users and ↓ prices. But cost of new gen is higher than depreciated cost of existing system, which ↑ prices. If new large loads pay actual cost of new gen (and associated infrastructure), data centers can be a net positive for existing rate payers. This is doubly true if the large loads are subject to curtailment during emergency conditions. Smart system design can allow new loads to be met and improve affordability/reliability for other customers.