PostScript has never been that consistent, and the abstraction is decidedly leaky. Having to upgrade the RAM in your printer in order to print more complex docu

PostScript has never been that consistent, and the abstraction is decidedly leaky. Having to upgrade the RAM in your printer in order to print more complex documents is not a fun experience. As it happens, I think a lot of modern printers do expose an abstract interface - it's just generally a proprietary raster-based one that doesn't involve running arbitrary user-supplied code.