With the July security patch already released, one device that was glaringly missing was Google’s last first-party tablet before the Pixel Slate: the Pixel C. This suggests Google might be ending its support for the 2015 tablet. As we know, Google only guarantees updates “at least 18 months from when the Google Store last sold the device.” The tablet was last seen available at Google’s Store in December 2017. So, this seems to line up with Google’s policy. However, the company hasn’t released any official word on whether it has taken the tablet out of the update cycle.
Source: 9to5Google