What we said about other platforms will stay... If people want real-world protection against zero-days used by exploit developers like Cellebrite and MSAB who we have directly disrupted and likely Paragon (Graphite) and NSO (Pegasus) whose previous victims have turned to using GrapheneOS, they know what platforms they have to give us to accomplish that.
We are on their radar and they watch the work we do closely and have a research target in attempting to exploit GrapheneOS. Cellebrite have separate pages on their docs just about us... The moment we commit to any other device, that OS / device combination will be researched far and wide for security holes. Insecure devices without updates or hardware security features WILL be exploited. They'd win and you would lose.
I lack confidence that the Linux developer community will change their priorities. They care more about being anti big-tech or promoting some dogmatic "freedom" talking point than things like this. While they are good values to have, you won't be able to practice them safely if this is what oppressors are working with.