The elevators in my building were originally installed in 1975. Some time around 2005 before I lived here they got a “brain transplant” and the controller up in the machinery room is now a couple of circuit cards and a bunch of status LEDs.
Still sitting in the room is an electrical cabinet about 6’ tall, 3+ feet wide and about 1 foot deep. When you open the door it’s a wall of relay sockets, each about 2"x1.5". There’s roughly 700 of those sockets.
The wiring plane is on the back side against the wall and the damn thing weighs hundreds of pounds and can’t practically be moved. Which is why it’s still sitting there.
All the relays themselves were pulled from their sockets. Probably to be used as spare parts for other older elevators the company serviced.
By coincidence I was looking at this relic just last week.