I offer a WordPress update service. Every three months I update the client’s WordPress software, plugins and themes. I have eyes on the site before and after the update. The service I provide has an attention to detail that you just won’t get with one of those automated update services.
Last week I worked on an old WordPress theme that had information hard-coded into it. There were tables, images and included files all coded directly into the WordPress theme itself. While the site owner could update pages and posts he couldn’t update the site menu.