The virtio network drivers for DragonFly (mentioned previously here, here, and here) went away.  Apparently the original FreeBSD code was not supposed to be available publicly, under a BSD license, and it’s having a knock-on effect for DragonFly and probably NetBSD.

(virtio drivers, if this is an unfamiliar term, are for devices in virtual environments, as when DragonFly is running under VMWare or something similar.)