I had a self-hosted WordPress blog from 2006-2010, but security updates become a burden, especially since I had to modify the WP source code a little to do exactly what I wanted with the RSS feeds.
After a few years of not blogging at all, I decided to use the simplest possible "system", which is writing blog posts in raw HTML in a text editor, as well as writing the RSS feed in raw XML in a text editor. It's not pretty, but it's zero maintenance. I've been doing that for 10 years now, and I don't think I'd ever go back to a third-party dependency.
I should mention my other motivation: occasionally one of my blog posts will get massive traffic, such as #1 HN, or getting linked by the tech media. In cases like these, static HTML files are great. My website never gets overwhelmed and becomes unresponsive from the load, even though it's just on a little shared hosted server.