Static websites are great of course, and the article outlines that nicely.
The problem that I've been facing personally is that most of the times, the people who are updating and maintaining content on marketing websites are not developers.
So having to use the command line for static site generators such as Jekyll or Middleman is just not a good experience. Don't get me wrong, I LOVE static site generators in general and I'm using both Middleman and Sculpin myself.
Other people has seen this problem too, and some user-friendly-ish static site generators have started to surface, but I want to chime in with a solution to that too since I believe that the best way to adopt static site generators is to use the tools that content creators and maintainers already love and are familiar with, e.g. WordPress which now has a whopping 25% marketshare[1].
I built SpudPress[2] with a friend. It is a hosted static site generator for WordPress. We automatically generate a static version of your WordPress site and host in on a super fast CDN. You don't have to worry about any of the edge cases of generating a static copy, we take care of all that automatically for you.
[1] http://ma.tt/2015/11/seventy-five-to-go/
[2] https://spudpress.com