[crwalker]

Fused filament fabrication (FFF) is fighting against physics in the same way that O(n) vs O(n^2) vs O(n!) algorithms have wildly different performance at scale.

It's a point solution, depositing ~1 voxel per unit of time. Running print heads in parallel is still O(1). Speeding up the print head runs out of steam because you run into vibration limits for the machinery (you can hear the rattling in the audio for this article). To really scale you need to deposit ~n voxels per unit of time (HP's MJF technology) or ~n^2 (Carbon's CLIP).

You need lots of voxels for high resolution for most applications. There are certain exceptions like prototyping in PETG or 3D printing concrete houses where the speed limitations of FFF may not be a big issue. But for 3D printing to compete with many forms of traditional manufacturing, simultaneous parallel structuring of matter is key.