The problem is that transition would require a ~95% drop in stock price, and the company isn't going to survive that.
GM - $74.5B market cap (6.2M cars sold annually)
Ford - $50.2B (4.6M)
Volkswagen - $40B (9M)
BYD - $100B (4.6M)
Toyota - $256B (11.3M)
Hyundai - $57B (7.3M)
Tesla - $1.4T (1.6M)
The numbers simply don't add up.