I'm hoping it is pretty smooth. This is something they have to do, so it was not initiated by me.
They are trying one method first and if that fails, then the rest falls on my lap to upgrade the forum software. Since I have left it alone for years, that is my responsibility. There are lots of horror stories out there when you upgrade to the "newest" version. That usually means all new bugs and problems. If the forum was current the move would be even simpler.
Upgrading can really bring things to a halt and also create some big headaches for everyone.
David