Not the GP: Android is NOT open source in my world. It's a code drop. It's what Microsoft used to do, before they discovered GH. "You'll get what we did after the fact".

Yes. AOSP is available as 'open source'. As a giant code drop, as far as I can tell. And the steering party for Android is .. that Ad company. Even 'Nexus devices' aren't able to boot using AOSP last time I checked (Nexus 7, the ~newer~ version), so that is really bullshit. It looks like "Have fun with our current state, and really - nothing will work on your devices anyway because you need a ton of binary blobs matching our kernel".

Android is about as close to open source in my world as .Net was via 'the reference source' a couple years ago. "Source available" vs. "Open Source".