[imtringued]

These discussions are always super boring. There are dozens of technologies that can scale to the level needed but everyone goes goes lithium ion and pumped hydro as if everything else didn't exist.

Sure cell batteries might not work, we can try out flow batteries, we can try liquid metal batteries, we can try hydraulic hydro storage, we can try out hydrogen, we can try compressed air, we can try electrolyzing iron or aluminum, we can try another dozen different things and it is highly likely that at least 3 will work out just fine.