I do! No maintenance, no security risks, blazing speed, cheap hosting. Seems ideal for a blog you don't update that often, for example.
Those of us who found we were spending less time writing material for our Web site and more time upgrading Wordpress!
Error connecting to database
People with static content that they want to put on the web?
I once have the table of posts on a Wordpress site get corrupted. The whole contents of the site has vanished. I managed to restore the table, but that had me thinking about using a such CMS.