It's nice that they get some use out of 3d printing, but what's the point of R&D in ICE cars? It's a dying technology. In twenty or thirty years their sale will hopefully be banned in most interesting markets, or at least strongly disincentivized.
I’m not a “business” person by any means, but I tend to doubt that every automaker in the world is making a poor decision (on a financial level) by continuing to improve their ICEs. There are incredibly smart teams of people making these decisions, and they’re doing it for a reason.
Engineering has a habit of advancing due to incremental improvements. The ICE still has room to grow and become more efficient.