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GrapheneOS is finally ready to break free from Pixels, and it may never look back
(www.androidauthority.com)
Icon base by Lorc under CC BY 3.0 with modifications to add a gradient
If I read previous articles right, Google has stopped shipping Pixel specific hardware drivers down to the android open source project, so any hardware support graphene figures out going forward has to be reverse engineered anyway.
So that's some additional motivation at least.