@lanodan @PurpCat @Moon @takao @tsugumi I do not yet know, how big can of worms is weird usage of RJ-45 ports, but those are also common I think.
I am almost sure one of our network switches has a mgmt console on RJ-45 port, with an adapter to RS-232/DE-9 attached, only to it being immediately converted to USB to attach it to a “normal” machine…