Google's Nexus 6 has been done and dusted. It's been three years since Motorola and Google launched the Nexus 6 and the search giant has already stopped providing software updates to the phone.
However, it now appears like the phone will receive Android O update. According to the Google Git, Google is testing the phone with the latest Android O Preview, which means that the search giant still has plans to release the update to the phone.
Google has a knack of testing upcoming Android versions in older phones to test the compatibility. If we're not wrong, the company is continuing the same with Nexus 6 as well.
That said, Google recently released the Android 7.1.1 update for Nexus 6 owners, concluding it as the last OS update to the phone. Since then, Google did not release the Android 7.1.2 update as well to Nexus 6.