They are the only Android phones that have the proper security primitives to build a secure OS on top.
Also, they are working on bringing a non-Pixel alternative to market:
https://www.androidauthority.com/graphene-os-major-android-o...
Also, they are working on bringing a non-Pixel alternative to market:
https://www.androidauthority.com/graphene-os-major-android-o...