I, and several of my colleagues, have been running dozens of OpenBSD systems for about 10+ years. In particularly, OpenBSD had an elegant IPv6 Firewall/failover mechanism about 5 years before Cisco finally decided to port Active/Failover to their ASA platform - so we were forced through sheer necessity to deploy OpenBSD in what was otherwise an all Cisco shop. Further to that, OpenBSD's ability to track several hundred thousand shortlived UDP sessions state fully on inexpensive x86 systems saved us several 10s of thousands of dollars over the equivalent Cisco systems.
At one point, all of HPs internal infrastructure was transitioned off of the Cisco ASA onto OpenBSD firewalls - OpenBSD is reliable, and industrial.
Needless to say, I'm a fan of OpenBSD and consider it critical to the various infrastructures that we deploy.
I've never been tempted (nor, to my knowledge, have my colleagues) to even consider installing X-Windows on an OpenBSD system. So the entire thesis of this article is beyond silly to me.