More to the point: could you have build those same projects in the 70's/90's when those were new vehicles? I rather doubt it, too. Parts markets are real, but they take time to mature.

I mean... where do you think the parts would even come from? Tesla's factories are at capacity building new vehicles (in the case of the model S and X, they're actually almost a year behind orders!). Who's going to make the stuff you'd expect to buy anyway?