This reminds me of how RFC1918 address space is supposed to be "never connected to internet" (including NAT, because when it was written NAT would have violated

This reminds me of how RFC1918 address space is supposed to be "never connected to internet" (including NAT, because when it was written NAT would have violated basic host requirements). And some computers abused the hell of it, for example Digital/Compaq Alpha EV7 "Marvel" line, where each processor had its own address in 10/8 subnet and essentially equivalent of BMC controlled the computer through 10mbit ethernet linking all components