I really think BNEF is misleading people with this sort of analysis. This frames the discussion as being about how long we must wait for sticker price parity. But in my view, that is a lagging indicator of EV adoption. It may be critical to converting the last 5% to 10% who hold a stubborn emotional attachment to gasmobiles, but it is not critical EVs being able to capture over half of the new vehicle market. Consumers are quite willing to pay a premium for EVs, and any profit to be had in making cars depends on consumers being willing to pay a premium. Sticker price parity happens when EVs are so dominant in the market that all opportunities to earn premium on EVs have been thoroughly satisfied. So price parity is the end of the game, not the beginning or the middle of the game.
But BNEF seems to act like sticker price parity is some barrier to EVs going mainstream. It would be much better for BNEF to frame this as estimating when EVs will capture say 10% share of each of these markets. You can only get to 10% penetration once you have truly competitive products in the market. Whether these are at sticker price parity or not is a much less important question.