I moved my blog from Wordpress to a static site but I'm actually thinking of returning to Wordpress. Wordpress gives you comments, RSS feeds, search, categorisation and mailing list subscriptions out of the box. I'm missing those features in my static site. I don't want to outsource comments to Disqus. And there are caching techniques you can use to speed up Wordpress.

I'm guessing most of the static site generators probably fulfilled the needs of the programmer who wrote them (which is totally fine and kudos to them for releasing their work so others could benefit). However, static site generators are not what you'd call "user-friendly" (in my view) unless you're comfortable with the command line and like markdown. (Wordpress isn't particulalry user-friendly either, but more so than static site generators in my opinion.)