After November 2021, using Drupal 7 and 8 might be flagged as insecure at 3rd party scans and security tools since it will no longer be getting official support. In other words, end-of-life means that it will no longer be supported, maintained, or enhanced by the Drupal community. Maintaining your site on a version of Drupal that has reached EOL will mean that a few things discussed below. The Drupal Security Team will not provide support or Safety Advisories, making your site's data and infrastructure at a much higher risk of compromise and hacking. Projects, themes, and Contribution Modules (modules built and maintained by the Drupal Community to increase performance ) will no longer be built, maintained, or advanced from the community. This will leave present Drupal 8 and 7 websites stuck with all the performance they now have without a community to maintain and fix problems with current modules. Drupal 8 and 7 sites will no longer be able to utilize the community service system to build, preserve, improve, and provide security to the program's core or to some modules. Utilizing unsupported software is risky rather than recommended. Hence, you must adopt Drupal 9.