And I don't understand Wordpress as a CMS. It's frankly a terrible one as well. Poor internationalization support, doesn't meet government accessibility requirements, its non-structure makes maintenance and teamwork almost impossible, its plugin structure is a landmind, terrible (no) dependency management, encourages deployment via FTP, and a terrible security model.

I'm not a Python guy, but Plone kicks its ass in pretty much every way as a CMS.

Wordpress can't seem to choose what they are- and they fail miserable from a technical perspective (yes, I know they have a huge market share, but I'm not one to believe that the markets actually pick the best option. McDonalds burgers are not the height of cuisine).