A Terawatt hour is about a years production from 30 Tesla gigafactories. We're going to have that amount of production within a few decades. Probably before small modular nuclear reactors have gotten their first production reactor off the line. Building new nuclear is riskier than other existing technologies, as evidenced in South Carolina, Georgia, Hinckley, and others. Therefore it currently seems that building nuclear is less plausible than building many terawatt hours of storage. SMR may change that, but I have a feeling that current companies are not planning for the grid of tomorrow, and are stuck in the last century when it comes to the grid's needs.