It's one of those things where $400 is WAY too much for a homelabber, but most companies (even small ones) can barely count that low when speccing out hardware, ESPECIALLY these days. $400 is like one hard drive in a machine that will potentially have 8-24 of them.
......Unsettlingly that's also like 16GB of dram in a machine that might be measuring memory in TBs
I kinda wanted to get a KVM recently, but decided to save my money to afford RAM for my planned server build instead. Might even get a 32 GB kit for $400.
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