They are getting plain awesome with the 3D printing. Believe it or not, similar technology dates back to the sixties. At a quarter to half million or so in those days car manufacturers were some of the few people that had them but they had small maybe one foot by one foot or not much bigger, little tanks with some type of resin in them. I think it was two lasers, where they intersected the resin would harden. Took prototyping parts from hundreds of hours to a few hours back then.
In the late eighties I did some three D wireframe modeling in AutoCAD. Drew the components of an air conditioner to fit in a backpack for the military. I could move each component around and fit them together. If something fit or didn't fit in my computer model, it would be the same real world too.
If you are scratching your head what to get me for Christmas, one of those printers to print out about a forty foot boat would work!