The Site Health tool has seen a considerable revamp. We see a new validation tool that checks issue responses and tosses invalid ones. This reduces the likelihood of the health tool throwing fatal errors. Additionally, WordPress 5.6 comes with the ability to schedule site health checks. This way, you’ll no longer run the danger of a test running during times of high site traffic. Finally, there are many under-the-hood improvements that make use of the REST API.
Changes to Automatic Updates
With this latest version, you can enable automatic updates for major releases as well as minor core updates as well as theme and plugin updates. The goal is to increase security for the large part of the web that WordPress powers. One note of warning though, we would only turn this feature on, on your staging site to test that nothing breaks before pushing it to the live site. Luckily in existing WordPress installations that update to version 5.6, this is an opt-in feature rather than on opt-out feature for new installations.
Under the hood
PHP8 support (Beta)
WordPress 5.6 marks the first steps toward WordPress Core support for PHP 8. Now is a great time to start planning how your WordPress products, services, and sites can support the latest PHP version.
Updates to jQuery in WordPress take place across three releases 5.5, 5.6, and 5.7. As we reach the mid-point of this process, run the update test plugin to check your sites for errors ahead of time.