Construction will pick up once there is enough renewable capacity to "charge" storage from. Storage that must be charged by burning NG would be stupid. There i

Construction will pick up once there is enough renewable capacity to "charge" storage from. Storage that must be charged by burning NG would be stupid. There is no need for a storage "center". Energy will be stored wherever convenient. Utilities will build out zero-opex storage so they can drop NG opex. Many different storage technologies will be used. The cheapest ones will eventually be identified and used more. But anhydrous ammonia and hydrogen are certain despite being far from cheapest, because of other merits. Right now the overwhelming majority of utility storage is pumped hydro, using existing hydro power reservoirs. I expect various gravity methods, including pumped hydro, to continue to dominate. New pumped hydro will not consume watersheds. (But Energy Vault, NRGV, is strictly a scam.)