1. Increase Security
The main reason to keep your site up to date is to ensure that it is secure against attacks from malicious parties. The wordpress team is constantly working on identifying security risks & vulnerabilities. Update to the WordPress framework, along with its’ themes and plugins, often increase security by patching existing vulnerabilities, and strengthening against malicious attacks. When new versions are released, hackers will monitor the release notes to learn of vulnerabilities they can exploit. By leaving your wordpress site unaltered, your are opening yourself up to hackers by leaving known security holes in place.
2. Fix Bugs
Updates to wordpress and its plugins and themes often include bug fixes that were found in previous versions.
3. Performance & User Experience
Often updates will enhance your site’s performance, or that of its plugins. This means your site can run faster, easier, and more efficiently, saving you and your users time and bandwidth, and making your site generally nicer to use.
Often your plugins will need to be updated to remain compatible with the new versions of wordpress. Sometimes, updating wordpress or a plugin can result in compatibility issues with another plugin, which is why it is so important to back your site up. Usually, this can be avoided by using only plugins from reputable developers, but this is not always the case.
5. Future Proof
At some point, you are bound to want to make changes to your site, and this can sometimes require the latest version of wordpress. For instance, if you need to add a new plugin to your site, and it is incompatible with older versions of wordpress. By keeping up to date with all the minor changes and errors over time, you reduce the amount of time and effort required to update. By leaving your site for a year or two, all of those small issues have become intertwined, making diagnosing and fixing problems harder, more time-consuming and expensive.
83% of hacked WordPress sites weren’t updated