The two are not exclusive. The batteries have indeed cost too much until 2015 or so, which is still 5 years earlier compared to the 2020 target BMW is giving.

The two are not exclusive. The batteries have indeed cost too much until 2015 or so, which is still 5 years earlier compared to the 2020 target BMW is giving. However, it's undeniable that the carmakers weren't in a hurry to build EVs because EVs would be too much of a disruption to their businesses. Maybe a linear 0.5% growth per year? Yeah, they could deal with that. But they'd hate it if the EV market explodes to 10% in 2022 and 20% in 2025, and 50% in 2030.