I've kind of lost interest because unfortunately most US producers use Shapeways and that is totally undependable now when it comes to quality, unreliable on delivery and very costly to boot,
Outfits like i-materialise are more consistent but now very expensive.
While this does not represent the entire sector, these two were two big participants and I see a loss of enthusiasm for 3-D compared to a few years ago. (Again, maybe that's primarily US outline.)