The HP Laserjet 2100 M (PCL and PostScript) is still running.
Someone interested into the original PCL Language book which came with the printer?
The print server has been replaced by an usb-2-centronics dongle recently to reduce energy consumption further.
An about 25 year old laser printer running almost flawlessly mechanically, with latest MacOS and Windows 10 OS, supporting PCL6 and PS is a thing. He is on the 3rd toner cartridge (at least 5 years old).
Only needed for rare cases of government mandated written docs like passenger locator forms.
Paper transport has been unreliable almost from day 1 based on dried up rolls and paper.