Mark Pilgrim: The <section> element is a very straightforward HTML 5 feature that you can’t actually use yet.
Jeff Schiller: These days, Internet Explorer is the last browser I look at… as long as all my textual content is actually visible, then that’s just fine by me.
With apologies to Mark (and I truly understand where he is coming from), it seems to me that we would all be a lot better off if less people listened to him and more listened to Jeff.
Frankly, I’m surprised that more WHATWG members don’t have the cojones to make use of straightforward markup innovations like the section element.
Meanwhile, I think I’ll take a bit of Ian’s advice, and drop my use of the X-UA-Compatible header, making my blog’s front page simultaneously demonstrate both Mark and Jeff’s points.
The reason I don’t make use of them is laziness: I changed the DOCTYPE, and left the rest verbatim (I had, however, built the theme to be both conforming HTML 4.01 and 5, with the exception of the DOCTYPE, but stayed with 4.01 to avoid having to bother changing things when 5 changes to make my site non-conforming).
As long as no one is proposing to replace <p> with <paragraph> or even <para>, nor proposing <section> as a replacement for <p>, I don’t see how a parallel with DocBook can be drawn. And no one is so proposing.