WordPress 5.0 with the redesigned Gutenberg editor was released today. We’ve been using the Gutenberg editor plug-in for several months now without any major issues. It’s a bit more intuitive with its block structure rather than the Tiny-MCE editor. This site and several others we maintain were updated this afternoon trouble free (so far). If you’re not sure how the latest release will affect your site, make a backup first or test on a development server with a current copy of your site.