Rubbish. IBM do not make the source code of their OS's for example z/OS available to anybody.
Yeah, and that's what they said about Microsoft until the Chinese and Russian governments came along and twisted their arm a bit.
To be honest its not a server if it has a keyboard and monitor attached.
An IP KVM and IP PDU (and/or IPMI) in a datacentre can be the difference between sitting in the comfort of your own home (or office) diagnosing servers or having to stand around in a noisy dull environment.
For the majority of IT environments,having console level keyboard, mouse and monitor access to your server at all times is a must.