A problem might be that the mfs-/dev created by init(8) is too bare
to be generally useful on some platforms (i386, e.g.). An rc.conf-knob
to have an init(8)-created  mfs-/dev populated via "MAKEDEV all"
later on wouldn't hurt, I think. OTOH, that would probably require
a larger mfs than currently set up because of the number of nodes.
I guess a devfs would be most convenient in any case... ;-)

-- Dennis den Brok