re: My HP Laserjet 1100
What really blows my mind is that Unix & Linux can print to it just fine on brand new hardware because HP themselves wrote & released cups drivers for it.
https://www.openprinting.org/printer/HP/HP-LaserJet_1100
HP once made tanks for soho printers. Now they just make disposable hardware with quickly abandoned support.
re: My HP Laserjet 1100
Also, on a positive tangent, the long since lost manual for my printer has a section on cleaning the lone faulty part: the pick-up roller. Thank the Internet Archive for preserving the needful things their makers don't.
https://archive.org/details/printermanual-hp-laserjet-1100-user-guide/mode/2up