Did netbsd ever support force remount readonly for root?

[Dan LaBell <dan4l-nospam%verizon.net@localhost>]

Did Netbsd, ever support force remount readonly for root?
(filesystems, naturally, and superuser, pedantically,
and also, as parameter to the command mount, naturally)

Pretty, much if I was ever in the situation, where I
would crave it, I take a few stabs at syntax, and give up.
My first experiences as root at that time, when I knew both that
there was such a thing, and, could successfully use it, would be
first be Solaris 1, and then Linux. So, if it's not that there,
that's fine;  I'd just be as happy moving to other things
to consider before shutdown/reboot.  Man page has never helped,
and I given up trying to make sense of it -- since Netbsd 5 --
to that detail as far as mount features, specific to a system
in crisis, was always ambivalent, on anyone's unix.

In fact also, on GNU-Linux, since it was the Linux How-to's, that were
so, darn, pleasantly, pedantically, helpful.

So, long story short, am I stupid on this?!?