A mips32 port would also be very desirable for all those shitty little routers with their ancient Linux kernel, but sadly nobody is working on that at the moment.
So, should the network and firewall OS that many people claim OpenBSD is, slash its support for MIPS devices?
There's probably a few hobbyists that still use SGIs. Octeon is mostly commercial vendors, who could pay for all of OpenBSDs needs out of their fancy executive toilet paper budget. And there's one OpenBSD hacker who uses Loongson, even GNU cult leaders use GNU/Linux on Loongson instead.