MyBB lacks some specific features we need for the user permission system. SMF was the only board software we reviewed that allowed us to do everything we needed, right out of the box.
I'd love to know what features. MyBB's options for user-groups are vast, but its obviously something very specific.
SMF does a pretty good job of staying on top of the security issues. I cannot complain about that. Not sure what you are on about or why you hate SMF so much, and then recommend them. You do realize our board is SMF?
It would have felt unfair to not talk about the 2.x SMF upgrade over the current 1.1.16. Especially if I'm going to talk about another CMS all together.
And then this is what sparked some of it.

I thought at first you were at the mercy of the "free forum hosting" but when it was merely displaying who created the current theme.
Many "free forum hosts" screw you out of the ability to access your database, whether it is to create a back-up, modify, or to merely take with you as you as you upgrade to a full-hosting plan or to your own server. I have seen it far too many times where the "owner" loses out on many options and realizes how limited a free-host is, and since they do not have a c-panel to use, they're stuck. This, pisses me off to no end...
But if you have a full-version of SMF I have to apologize in that regard...
And in a nutshell, the feeling of intangibility of SMF leaves me feeling that I'm missing out on something, especially when I'm trying to provide something for my users.