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Na-Ion batteries are better than LFPs when considered the temperature range between 0C and 0f. In this [0] review, prof hobo demonstrates this is the only reason to by Na-Ion (right now).

[0] https://www.youtube.com/watch?v=OoZ_g_MShTw

Your mixing of units is baffling, almost nobody knows both Celsius and Fahrenheit. For the rest of us:

-18°C to 0°C

0°F to 32°F

I knew what 0°C is in °F since I know the °C to °F conversion rate, but my European self isn't able to assign any actual reference to that, which made it kinda useless to me :)

They are better in cold and have higher charge rates. Eventually (10-20years) they’ll be cheaper than LFP. All while 15% lower volumetric density.

The $15/kWh is misleading as it's only the cost of the raw materials.

The article claims CATL have given bulk cell pricing at 19$/kWh.

That still leaves an Additional overhead due to power electronics and assembly but all in all it's a pretty impressive development.