If Google were indeed intending to do this, what could happen is that Google takes Android closed source from here on out, spinning off whatever remains of AOSP up until that point into a separate company or project, as potentially ordered during the antitrust case against Google in the United States. This would leave Google free to continue developing its own “Pixel Android” entirely as proprietary software – save for the Linux kernel – while leaving AOSP in the state it’s in right now outside of Google. This technically means “AOSP is not going away”, as Chau claims.
Of course, other parties would then be free to continue working on and contributing to AOSP, but AOSP itself would no longer benefit from the work done by Google. Again, this feels very similar to how illumos and OpenIndiana are built atop the last open source release of Solaris from 2010, without any of the additional work Oracle has done on Solaris since then. As you can tell, there’s a lot of speculation here, because even if all of this is true, it seems the ongoing court case and any rulings that come of it will play a major role in Google’s decision-making process.
The Android Open Source Project has been gutted over the years, with Google leaving more and more parts of it to languish, while moving a lot of code and functionality into proprietary components like Google Mobile Services and Google Play Services. Taking “Pixel Android” closed source almost feels like the natural next step in the process of gutting AOSP that’s been ongoing for well over a decade. As it stands today, a default AOSP installation requires a lot of additional components and applications before it can be considered a complete mobile operating system, and if it were to be spun off into a separate, non-Google project to which Google itself contributes nothing, its future seems quite uncertain.