Does anyone know what the potential as a utility-scale energy storage medium is? I have this inkling that developing this for cars isn't the best use, as batte

Does anyone know what the potential as a utility-scale energy storage medium is? I have this inkling that developing this for cars isn't the best use, as battery EV looks set to best Hydrogen fuel-cells in that market. Instead, I think pursuing it for shipping, aviation and utility-scale energy storage is a much better idea.