SMR is based upon well-known technology that we have spent decades working on and improving. Other than pumped hydro and batteries there is no potential grid-s

SMR is based upon well-known technology that we have spent decades working on and improving. Other than pumped hydro and batteries there is no potential grid-scale energy storage mechanism that exists beyond desktop models and toy pilots. Battery prices are dropping but the easy low-hanging fruit has been plucked so now the rate of price decline is dropping -- 83% last decade but only 33% predicted over next five years. Production is also a long way off from where it would need to be. There are a couple of GWh plants coming online, but that is still only a fraction of what is needed if battery is going to scale up to handle grid storage. Lots of hand-waving examples you have there, very little in production. A more likely long-term outcome will be to push the storage burden on to the renewable production plants -- only accept power from a producer at a rate they can provide over the next 24 hours with the grid only needing a small surge capacity built into it to smooth out demand spikes.