Right, hot thermal storage is used to store electricity. And yes, hot thermal storage does not solve the world's energy problems by itself. To your point about

Right, hot thermal storage is used to store electricity. And yes, hot thermal storage does not solve the world's energy problems by itself. To your point about electricity being 1/3 of energy consumption, I still think it's important to celebrate and invest in technologies that store electricity. Even though electricity is just one part of the energy picture, electricity is far more expensive to store than other kinds of energy such as liquid fuel (which can be stored in barrels and tanks), natural gas (which can be stored in the ground or in tanks), or solid energy sources like coal or nuclear (which can just sit in a box).