I don't agree with this assessment. Open Source does not require that the maintainers will allow you to push changes upstream that they don't like. Is AOSP no

I don't agree with this assessment. Open Source does not require that the maintainers will allow you to push changes upstream that they don't like. Is AOSP not open source? Chromium? Atom? Linux? Linus rejects a lot of stuff. Now, it may be poor stewardship if valuable changes are rejected, but Open Source is about your freedom with the code, not the willingness of the project maintainers to commit your pet features.