Qualcomm and Google are now collaborating to extend Project Treble support to offer four Android OS versions and four years of security updates starting with devices powered by the Snapdragon 888. With this move, Qualcomm hopes to give users a more predictable software lifecycle and ensure most of them are on the latest OS release. The onus of actually releasing these updates, however, still rests on OEMs.
https://www.notebookcheck.net/Qualcomm-and-Google-extend-Project-Treble-to-four-Android-OS-versions-and-four-years-of-security-updates-starting-with-the-Snapdragon-888.509336.0.html