I have a pretty ancient HP Laserjet (a couple of decades old) that still runs like a champ, but recent experiments with trying to proof some variable fonts has run into some trouble. I get long processing time and then vague error messages, even with relatively simple documents and variable font files that themselves are not large. I don't quite understand the tech, particularly whether the printer is being asked to do more processing and thus in danger of hitting the limits of its modest RAM. Has anyone else run into this? Is this, as it seems, a problematic issue with variable fonts and old printers?