"...3D printing is an over-hyped, steaming pile of crap."
Mostly. There are niche applications where it's highly useful and cost effective. The other 99% is crap plastic junk.
That said... Every damn lie about technology eventually comes true. Facial recognition was a damn lie ten years ago, maybe even five. Now it's almost true. And just like Fermat's Last Theorum, once it is finally demonstrated to be true then we can appreciate what a damn lie the original claim really was.