I know this is a kind of shitty riposte but if you don't like the code-base or some feature it is open-source you know. (I say this in the full knowledge that I hate this come-back but for a project of Wordpress's popularity I think that it's valid enough.)
I have to deal with a lot of non-techies who want to get stuff online and nearly all of them gravitate towards Wordpress. It's a dead simple model, the admin UI is uncomplicated and it's pretty ubiquitous. How it got to be ubiquitous is another question, of course.
Full disclosure: I use it myself even though I could conceivably hand-roll my own blog if I absolutely had to, but why should I when it does what I need which is post a missive or two that know one will ever read.
Congrats on the Four Oh I say, long live our PHP blogging engine overlords.