The legacy automakers have a big, almost insurmountable problem getting near Tesla. Over the next 10 years they two huge challenges which will occupy the best management brains they have. The first is producing electric vehicles profitably, not easy, as demonstrated by GM, to name one obvious example. Secondly they have to manage the run down of their existing vehicle manufacturing, again, profitably if possible. Remember also they can't just switch this off because they have to continue to supply spare parts to their legacy fleet, something that will be required for decades.Maybe VW could get to where they are producing cars cheaper than Tesla, but they wouldn't really be "The Next Tesla" at that point would they?
And it gets worse. You hear a lot about how much capital these companies are investing in the EV business. Don't forget that the legacy business also requires capital. Even as it is running down, it ties up billions in capital, which is unavailable to be deployed elsewhere. Oh yes, and there are dividends to be paid.
Compare this to Tesla. They have already solved problem one, and never had problem two. So along with all Tesla's other competitive advantages, this is one massive worry they don't have.
Good luck to the legacy companies because they are going to need it. There really will be only one winner.