Most of the multi color printers out there are AMS/MMU or similar, and there are many DIY options, like Armored Turtle or ECF.
They are an evolutionary dead end. Slow, wasteful, expensive to run.
The Prusa XL, or the Snapmaker U1 are the future direction.
Also a good CoreXY machine like vorons/sovols/ratrigs/VZ, etc can be upgraded with the Bondtech INDX tool changer.
We are talking 5x lower print times, 5x lower material costs.
There is going to be a glut of used Bambus and other multi material unit printers, when print farms unload them, since the tool changers will massively boost their bottom line.
Comments?
They don’t even handle multiple materials well. Changing between high and low temperature materials can clog the nozzle. Changing between materials that don’t stick to each other will make a weak part unless you purge a lot of filament between changes.
The only good uses for them is automatically swapping to a new roll of filament when the first one runs out or printing parts with a small number of color changes.