There are tons of devices used that have no built-in BMC (like the Thinkpads in the original comment in this thread), yet still need reliable remote control in certain cases (e.g. a remote lab, or multiple-unit headless testing).

It would be a bit odd if a place was deploying new Dell servers and slapping IP KVMs on top of them.

OK, I just don't see the intersection of people/companies that are using thinkpads in their server room and those willing to pay $400 for a KVM being too large