freebsd-update 11.3->12.1 ?

[Lena at lena.kiev.ua]

Can `freebsd-update` be used to upgrade from 11.3 to 12.1 in one step
(skipping 12.0)?

If something breaks (I'm afraid of
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=235077 ),
should `freebsd-update rollback` be successful?

I use GENERIC kernel.