Has this been in the news recently? Heard a few people talking about it now, it’s been a very common technology in the Automotive industry for the last decade or so. Printers aren’t massively expensive now either.
Stainless steel can already be done too
The quality of parts is very good, and the speed is ever increasing. I've had a full inlet system made for a development car, is almost as good as an equivalent plastic slightly more brittle mind.
Did read something about someone making edible stuff in them- seems a little strange!