The Android L developer preview remained largely static in the time between its launch and Lollipop’s official release. That isn’t the case with Android M, which Google says will receive monthly over-the-air updates. The first of them is now available for the Nexus 5 and 6.
There isn’t much new to see in this update. Google announced it last week when it released system images, and you can see the provided list of changes in our coverage at the time.
[Update: Nexus 9] Android M Developer Preview 2 Nexus OTA ZIP Roundup was written by the awesome team at Android Police.