The threat model is different, we really do have to lock down phones a bit more because they're used for user identification (but I think not to the draconian l

The threat model is different, we really do have to lock down phones a bit more because they're used for user identification (but I think not to the draconian level Google and Apple do). The result of not using AOSP is having to reimplement stuff, and it's not like this ecosystem has a lot of free labour just waiting around. Yes, Google would have diverged, but so would the community. If you're already willing to go for a Linux phone, compatibility probably isn't your main concern. I still wish them luck. With the way Apple and Google are going, there may be no other choice eventually.