Lol I thought that the scary thing in your bio is going to be a rickroll (I actually haven’t clicked it but I know you had a a link to a project on turbowarp with ?autoplay in your siggy before)
Additive manufacturing of parts is still far too costly for cars, but can rapidly create tooling to accelerate pace of innovation.
It’s already sensible for rocket engine parts. To the best of our knowledge, SpaceX is 2 or 3 years ahead of other companies in use of additive.