I’m surprised the article didn’t mention the possible market for sodium-ion in grid energy storage systems. Low energy density, the main disadvantage of this chemistry, isn’t really a concern when you’re just stacking a bunch of cells on a concrete pad in the middle of nowhere. But 20% lower cost and no risk of a massive self-oxidizing fire breaking out is a huge benefit. Even if sodium-ion never makes it to EVs, it could still be crucial to the green energy transition.
Actual quote from Adam Savage on an episode of Mythbusters.