"If all proposed gas plants are built, 70% of those investments will be
rendered uneconomic by 2035, according to the Rocky Mountain Institute."
Following is a chart from the article showing historic and future prices of existing and new gas plants and of new "Clean Energy Plans" (CEP) It shows that CEP (a mix of renewables, storage, and demand side management is already below the levelized cost of new gas plants, and will drop below the cost of existing plants some time in the early to mid 2030's