I might sometime. It was actually pretty easy to convert from SMF to MyBB for the tech-minded admin though. MyBB's converter tool is pretty good for the most part.
Yea, the MyBB merge tool is awesome. And the template system is a dream. Can be annoying to find the right one, but once you do it's great. There is a lot you can do with template editing.
Yeah, it's quite powerful for sure.