That's wild. <4BSD was never on my radar at all, from my first encounters in 1990.
Morally, this isn't really 2.11 anymore after so much backporting and updating, so my questions would be, what's the utility of such a platform, if not nostalgia or legacy support?
Not clear which arches are supported, aside from i386. My love affair with Open/NetBSD was partially sparked by its enormous roster of cool hardware support.