the very important thing about static sites are that you can much more easily "fire and forget" a static site - put it up on an S3 bucket site or whatever and you are pretty much in the clear about worrying about it.
put up a "fire and forget" site using any kind of PHP or (perish the thought) wordpress (assuming self hosting), and if you dont check that site a few times a year, it will be all Russian porn ads before you know it.