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I simply don't agree. What the old companies have are billions of man hours of experience and engineering. Tesla has cool new tech, but keeps falling apart on things Ford or GM solved 40 years ago. I'm not saying one or the other is better, but it's not like buying some dead useless company.
GM and Ford have billions of man hours assembling cars... and a super-tight battery supply chain they share with every other car maker scrambling to secure battery supplies right now. They can assemble the fuck out of those car parts, but in the end they are cranking out expensive cars with crappy range because they have no reliable battery source. Tesla has spent the past 15 years getting their battery supply chain…
And it's not about simply assembling things. Ford and GM have tons of engineering and experience on hand.