> Edit: in the industrial world equipment like this is not in racks/server rooms.

A rack by any other name . . . :-)

TBH I was thinking of not just the trad. IT server room racks but also of cramped radio comms "cupboards" by towers and of production circuit | industrial control access panels / locations in both indoor "warehouse" production and outdoor mineral processing circuits ..

Always handy to have a small known general purpose computer with ports, scripts, utilities, etc when you're tracking down the weird bug of the day.