A month ago WordPress developer team were working on auto-update option for its themes and plugins. However, recently WordPress announced that its plugin is ready to be tested and their next step is to implement an auto-update feature to WordPress themes.
Websites that are not updated frequently are more exposed to cyber-attacks. The auto-update feature is implemented for users who forget to update the theme and plugin after installing. The developer team is working on adding the feature to WordPress themes.
In the upcoming WordPress will have an auto-update feature. The user will have to check an option in the admin panel of their websites which will enable them to auto-update themes and plugins. The website admins will receive regular auto-update summaries via e-mail notifications. Developers disable or programmatically define auto-update settings with the help of Hooks and constants.
In 2018 Matt Mullenweg posted the timeline of the nine projects for the core to focus in 2019 that included the WordPress auto-update project. The team sets this project as a milestone of WordPress 5.5. WordPress site owners can test the Beta version.