I'm referring to the hyperbolic headlines talking about a "metal printing revolution," not the actual company. There are already off the shelf solutions to do nearly the exact same thing that everyone here is getting all worked up about. What's more, you could have purchased those solutions before the internet was even a thing.
I think OP is referring to the software-oriented HN crowd who have highly upvoted this article despite little evidence that desktopmetal is doing anything revolutionary.
https://www.desktopmetal.com/company/about/
I see a bunch of PhDs with backgrounds in material science (among other things). It's just possible they might have a clue.