Too bad most printers today are not capable of interpreting PostScript directly, like they used to back in the day. (Curiously, the microprocessors built into such printers were more powerful than those found in personal computers at the time.)
Yes, that was the big hope back then, that we would no longer need printer drivers. You could just just plug in any printer, or give an IP-address of a printer and it would immediately work.
Instead it got much worse. Now when you buy a new printer you have to check which operating systems is supported. My CUPS server has 2064 drivers just for HP printers.
Even though my printers actually do have postscript interpreters I can still not just plug them in to an USB port on any computer and print a document. It is crazy.
