Not an expert in this field, with costs or anything. My guess if not subsidies, it's a bet that electric energy will be cheaper, or batteries get more efficient to meet that price point in the 2-3 years it takes to ramp up production. In that time, they can get pre-orders.

This reminds me of car companies advertising guaranteed gas prices for certain types of cars back when gas started hitting $3/$4 mark. I would see commercials of new cars saying $2.50/g for the next 5 years or something similar.

Found one: https://www.caranddriver.com/news/chrysler-extends-gas-card-...

Chrysler, $2.99/g for 3 years if you buy new car.