https://wccftech.com/google-will-soon-mandate-oems-to-roll-out-android-security-patches-regularly/

Regular updates have always been a problem with the Android operating system, with several million devices still running an outdated security patch. Google has been hard at work attempting to remedy the situation, which is a herculean task, considering the sheer number of devices that run Android. At the annual Google I/O developer conference, Google‘s head of Android platform security David Kleidermacher talked about the upcoming security changes in the Android P release. He further stated:

We’ve also worked on building security patching into our OEM agreements. Now this will really lead to a massive increase in the number of devices and users receiving regular security patches.