Hi,
I came across https://wiki.freebsd.org/PkgBase#setup while researching an issue I had where freebsd-update messed up a remote system. I should say I messed up the remote system by skipping releases.
My issue was that I could no longer build ports because it would fail on devel/gettext-runtime. It would also fail on builworld and buildkernel.
This is a production system which I thought I would need to rebuid. The system was upgraded to 14.2-RELEASE and I followed the wiki since I understood it would fix the issues I was having.
After the "Six steps below are essential" I issued a "shutdown -r now" since very little else was configured. The system didn't respond to ssh. When I finally got to the location I saw that the system was running but had no Internet access because the /etc/rc.firewall was also replaced.
I think that a note on the wiki to remind admins that rc.firewall may also need to be replaced, as a 7th essential step, when working on a remote system, may be helpful.
All said and done this saved me having to rebuild that system. Thank you.