[dmoy]

People do fork.

Tesla's original was a fork of a Lotus. They got the whole chassis/etc from Lotus, dropped in their own drive train and other stuff. Other reply mentioned paccar.

Idk why it doesn't happen more often. I suspect most manufacturers aren't willing to license like that.

[jack_riminton]

But then they ended up using so little of the original Lotus that Elon said they should have started with a blank canvas

[wkat4242]

That wasn't really a fork, they didn't copy the design, they actually bought the chassis from lotus. It's not really that different from a manufacturer buying brakes or wheels from another supplier.

[mlrtime]

That wasn't a fork and Elon has stated it was a horrible idea that didn't work.