@dch I don't have a great deal of patience with people who supposedly follow FreeBSD, closely, for years, and then express dismay that FreeBSD can be upgraded:
pkg upgrade
I mean, come on, people. The plan was clear enough more than a decade ago.
In last year's <https://mail-archive.freebsd.org/cgi/mid.cgi?dfc2de28-f496-4746-ac78-5b5ff68c5ed6> I refrained from quoting Glen Barber (his 2016 call for testing):
"… Also note (as repeated below), running 'pkg delete -a' will implicitly remove base system packages after they are installed. …"