Drupal is mostly supported by a community of Drupal developers who volunteer their time and talent to build, maintain, and update features and modules that the rest of the world relies on who powers their websites by Drupal.
As you probably know, Drupal 7 is going away and being replaced by Drupal 8 and Drupal 9. That end date is in 2021. As we get closer to the end of Drupal 7, fewer developers have the time, energy, or interest in maintaining Drupal 7 code and modules.
Developers, by nature, prefer to look forward, learn new skills, and be on the leading edge of technology. So, most Drupal developers are working on Drupal 8 and Drupal 9 code and modules. Meanwhile, hundreds of mission-critical pieced of code and modules are being left abandoned and unsupported. This will only happen more frequently as we get closer to Drupal 7 end of life.
Responsible, proactive, organizations that rely on Drupal to power their mission critical websites and web apps should have a sense of urgency to start planning now to migrate out of Drupal 7.
Read our guide to Drupal migration.