When I created the SSG I use for my blog, I tested a bunch of different markup formats for the article content, but in the end I settled on plain-old raw HTML. Over the years, I've needed to render so many different specific visual elements in the blog entries that if I wasn't actually using raw HTML, I'd probably be using raw HTML snippets all over the place anyway. For another medium I might choose a different markup format, but when it comes to writing content for the web, with HTML I know exactly what I'm getting every time.