Maybe I will...
I've been tinkering with WP for over a year trying to get it to meet my needs. Yes, WP is popular, extendable and easy to learn *but* it has real maintainance and security issues. Alas, I failed, even with all the plugins, hacks and themes I tried, WP manages to be a show-stopper for my projects because of some WP design decisions.
I tried [crazy]Xaraya, EE, etc but never thought of trying Movable Type because I know no Perl, $$, etc. However, 2 days ago I went ahead and started playing with its free version and, to my surprise, the thing works like a charm. I mean, MT 3.2 is so well designed to the point that I don't have to touch a line of Perl.
Anyway, maybe WP 3.0 will be different?
I'm starting to have this image of WP as another MS Win: any kid can use it, there are lots of SW for it and it looks nice on day one; but every time you think about using it as an Internet server, you get a gut feeling you'll regret it. You read more, you test and you discover that you have a heck of gut!