Jekyll best serves a particular type of user and their needs. I'm a WordPress developer and make my living off it, but I absolutely hated using it for my personal site.
Now I can open my site in Textmate, make my changes, and use git to push to my server all in less time than it would take to do the same in WP. I don't give anything up(you can have archives, tags, and related posts in Jekyll) by switching and gain quite a bit of flexibility. Jekyll also fits into how I like to do things(ruby/textmate) which is incredibly important to some people.
So yes there are cases where Jekyll makes more sense. Depends on the user.
There are addons to most advanced editors to publish WordPress-posts directly from the editor (vimpress, wp-emacs).
Writing the posts in Markdown or similar is also trivial to do with WordPress.
Mind you, I'm not trying to advocate WordPress, but when I say WordPress you can substitute it with any simple, easy to install CMS.
I used to create my own CMS just for my blog. But then I needed some new features, but didn't have time to write them. So I just switched to WP, where most features are just an addon away. The only problem I have is that I need to update it whenever a security bug is discovered. For that security I see the advantage of Jekyll.
Now I can open my site in Textmate, make my changes, and use git to push to my server all in less time than it would take to do the same in WP. I don't give anything up(you can have archives, tags, and related posts in Jekyll) by switching and gain quite a bit of flexibility. Jekyll also fits into how I like to do things(ruby/textmate) which is incredibly important to some people.
So yes there are cases where Jekyll makes more sense. Depends on the user.