I think it is because traditional auto manufacturers are catching up with the electric car game. No other company will bet their reputation on self driving cars

I think it is because traditional auto manufacturers are catching up with the electric car game. No other company will bet their reputation on self driving cars, because their reputation is much more important than their electric cars' success. They can wait longer and try different variations until their electric car market grows profitable. Tesla on the other hand has to differentiate and stay ahead of the curve so it doesn't get trampled. That's why he is so obsessed with self driving.