There is already one car in China that ships with a Sodium based battery.

Honestly I'm more surprised we haven't seen any dual chemistry packs from any auto maker yet. This would be something like 25% Sodium Ion or LFP, and 75% NMC or NCA. So while there would be a slight reduction for total range of the car, the 25% sized battery could be prioritized for heavy charge and discharge while the 75% would only be used when the 25% is exhausted. Additionally this would mean the large majority of the wear and tear on the battery would be on the 25% size, and could be replaced possibly more frequently (every 10 years?) and separately from the 75% battery reducing the overall cost of battery replacement to a fraction of the cost of the whole pack.