there is still the economic problem, nobody wants a line item on their bill that says "energy storage" or "premium for using as much energy as you want whenever you want".

pumped storage doesn't generate any power it just allows you to use 80% of it later. Who is going to put the money out to build something that nobody wants to pay for that we currently get for free from traditional hydro and fossil fuel plants. Those types of regulatory changes don't get sold to the public quickly.