There is nothing new here.
When Lithium was being explored, so was it's atomic neighbor Sodium. It was found back then that Lithium would result in higher charge density, and that was that. Sodium research stopped. They didn't even know back then that Lithium batteries would require Cobalt and Nickle.They were looking at graphite.
So now with peak Lithium costing far too much... The less ideal material, Sodium, is looking a lot better. Sodium is far more abundant, batteries using it will weigh less, though they will be physically larger, and overall charge density will be less. The losses are minor for most commercial applications. The big win is more stable chemistry, easier support for molten salt infrastructure batteries, and lower fabrication and material costs. Much of the assembly infrastructure will be exactly the same, but the material composition will change. Less exotic rare-earths.