alt Hacker NewsFeeling rather flippant, but what's the difference in practice? Can you point to an AOSP "brand" phone on a store shelf that is "de-Googled" out of the box?
What is AOSP really for other than "open source washing" Google's ecosystem? Is it ever making standards that Google has to follow/comply with or is it always just the tail being wagged by the dog to make it look like the dog is happy about open source (but still isn't majority open source)?
LineageOS, GrapheneOS et al base themselves upon this upstream project.
A good one to familiarize yourself with, and support.