Over the last few years I've been experimenting with using a pen plotter to draw output from generative programs I create. While you can generate thousands of designs in the blink of an eye, a pen plotter can only go so quickly.
Most SVGs are generated using JavaScript, Go, or Python and optimized with VPype. I Interface to the Axidraw through Inkscape and the Axidraw CLI. For pens, I most often use Lamy Safari EF, Micron 01 and 005, or Staedtler pigment liner 0.1. Ink: Mont Blanc, Iroshizuku, or Diamine. You can read about my setup and process here.