A recurring topic on the lists is the suggestion that www.d.o should be based on a CMS. I thought I would try to summarise the argument a bit here. I'll also include some Drupal specific notes (my CMS of choice) - please feel free to add notes about other CMS's.

Pros

Cons

Note: Some of the phrasing in this page is "hot off the lists". It could do with a bit of tidying up.