"...too much filament..."

Yes, I have seen that the first multifilament printers purge more filament than they actually print in some cases. There are ways to eliminate the waste, but perhaps those designs haven't been commercially produced. I neglected that it is possible to make separate parts from different colors that can be snapped together, or glued together. Most people don't bother with multicolor prints. You demonstrate how much better multicolor prints are.