I agree with you that DUET is very advanced. I know that Klipper provides a method dispersed model of printing control of old "specialized" hardware and solid tech of Single Board Computer.
However, at this point this how I feel. Arthur C Clarke meant when he said that any sufficiently advanced technology is indistinguishable from magic. If you show someone something that is so far advanced from the technology that they are used to that nothing about it is remotely familiar then you might as well be showing them a magic box.
I'm trying to understand this magic box.