One problem I have with static HTML basic CMSes for non-personal publishers is that it can be a pain to migrate markup or templates if not rendered client-side.

One problem I have with static HTML basic CMSes for non-personal publishers is that it can be a pain to migrate markup or templates if not rendered client-side. If you've got thousands of pages, publishing a HTML change could require re-building of all static pages, which means it can be painful maintain once you get to a certain scale.