Actually, I do know the company that did the installation and the wiring. I’m gonna ask first thing on the 2nd… just out of f*ing curiosity… and to let colleagues know this person has shit for brains…
It used zeroconf/bonjur out of the box when no one else used it (or had to do some serious configs in order to get it working), that’s why. And, of course, since it’s the second most used OS other than Windows, printer manufacturers configured avahi/zeroconf/bonjur out of the box on their printers.
When there is enough critical mass that sees that this shit ain’t working… so, never most probably… or after a nuclear war or another global catastrophy. People tend to look in retrospect only when faced with huge problems.