If CATL and other LiFePO battery makers get them to 200wh/kg, which they teased in 2020, and they maintain the same cycle endurance, temperature range, safety,

If CATL and other LiFePO battery makers get them to 200wh/kg, which they teased in 2020, and they maintain the same cycle endurance, temperature range, safety, and cost advantages, it will be a real game changer. I've heard pumped water is like 90% efficient, but you need a gradient and space. Does wind power decrease in winter? I also remember schemes for making a huge solar farm in the Sahara and a superconducting conduit to Europe, and that was several paradigm shifts in solar cell performance ago (15 years). But almost all large countries seem to have a sufficiently sized desert to do this with (US, Russia, China). If solar gets good enough, and it is still on some prime parts of the economies of scale price drops, you don't care as much about long-distance transmission loss.