Sodium battery breakthrough - maybe

The video below talks about a break though in sodium ion technology. They claim 10,000 cycles and a cost of $10 per kwh. Although the the talking head in the video is doubtful of the claims.

…or LTO, which are a little less energy dense compared to LiFePo4 cells, but supposedly can discharge at a 5-10C rate. Also marketed as fast chargeable cells.

I think this breakthrough (if real) is about the cost per kwh, 90% cheaper than previous gen technology