We might also casually transfer it around the world in very low loss UHVDC transmission lines. As well as storing it short term in water reservoirs (or other g

We might also casually transfer it around the world in very low loss UHVDC transmission lines. As well as storing it short term in water reservoirs (or other gravitational storage), massive battery banks and in a bit longer term (like between seasons) as heat. Not saying that hydrogen can't have a role, but due to a low roundtrip efficiency it might just have a niche.