No, you got me. My mind had strayed forward to the HP DesignJets (large format ink jet printers) where a higher data rate was very useful, and back to several other manufacturers such as Watanabe (Graphtec) and a whole host of others. For some reason HP stuck with serial and HP-IB. I can't remember which was their first parallel plotter, maybe the electrostatic model (HP7500?) which could emulate a pen plotter using HP/GL or take semi vector data plus raster fills using HP-GL/2 and proper raster with RTL as well I think. Now that must be a rare animal now, and probably difficult to get consumables for. At least it never dropped ink on the floor, we still have big patches of yellow and magenta on the carpet in the office which leaked out from another electrostatic we borrowed to write a driver for. Very clever engineering which cut paper off a roll, wrapped it around a big drum, plotted the four colour passes and ejected the paper. It just got bored if you didn't use it for a few weeks and got incontinent. Can't remember the name.