HTML5 has ditched everything terrifyingly deprecated, kept the rest,
and introduced new elements that are truly useful and truly usable.
Examples of those items include
<article>, the tag-team
<dialog>, which utilizes
<dd> pairs previously seen only in
<dl> (definition lists)
to finally standardize written dialog.
I started serving some of Daring Fireball’s pages (including the front page and article archives) marked-up in a simple subset of HTML5 last week. All I had to do (mostly) was change the DOCTYPE declaration and remove some needless metadata cruft from the