What is going on is frustration. GrapheneOS has been relying on Google's good faith effort on providing binary blobs to Pixel in addition to AOSP to make their OS. Google was under no obligation to give that, and they stopped doing it for whatever reason.
To make things worse, GrapheneOS mentions legal/anti-trust blah blah blah, which means no engineer will touch / comment / help in the matter, and it gets routed to legal blackhole.
> This also marks the availability of the source code at the Android Open Source Project (AOSP). You can examine the source code for a deeper understanding of how Android works, and our focus on compatibility means that you can leverage your app development skills in Android Studio with Jetpack Compose to create applications that thrive across the entire ecosystem.
https://android-developers.googleblog.com/2025/06/android-16...
This was posted 2 days back.
Absent device trees, AOSP as of the Android 16 release is a subset of the utility of Android 15. If one sees the use of AOSP as mainly relying on the now absent functionality, then declaring "AOSP is dead" is not unreasonable.
If the Linux Foundation sold itself to Microsoft, ceased publishing kernel sources or binaries, and declared henceforth Linux would exist as WSL and nowhere else, it would be reasonable to say "Linux is dead" even if something with a subset of that functionality, named "Linux", still existed.