An even better question is why WordPress continues to win. I've done a few startups and quite often I will create the marketing front end in WordPress/PHP. Eve

An even better question is why WordPress continues to win. I've done a few startups and quite often I will create the marketing front end in WordPress/PHP. Even if the main application will be written in Ruby or Python. The reason is that there are just so many off the shelf templates and themes you can download and/or buy. And the themes are generally in the under $25 price range. Plus finding people who can maintain a marketing site in WordPress is extremely easy. For the simple stuff like "add a post" or "update the text" you don't even need to know PHP. Now it would be nice if there was a dead simple platform like WordPress for Python. But until that day comes it is still a pretty damn good solution for a site.