Man of Honour
- Joined
- 17 Nov 2003
- Posts
- 36,747
- Location
- Southampton, UK
https://xenforo.com/help/importing/
Can't see it being too hard. But as I said above, they'll probably want to keep their trust system and shop-forum software link integration, both of which are directly tied in with vBulletin.
I think the problem is getting time (and skills) to actually properly plan and implement what is quite a complex migration.