After a bunch of plugin and theme updates, and a WordPress update, the WordPress 2015 theme I was using wasn’t playing well. That is, if you consider not showing any posts at all as “not playing well.” So I switched to the 2011 theme, which always seemed a little more stable to me than other ones.
If you didn’t hear, there was emergency patches released for a lot of WordPress plugins a few days ago, because of a long-standing XSS bug. This is longhand for “update your WordPress plugins.”