Earlier quoted context omitted.
> It's still more open than AOSP I don't think this is true at all? AOSP is completely open source modulo driver blobs (which Sailfish has too) and Google services. One can make a fully functional system, modulo drivers, out of only open-source components using AOSP. It's not possible to do this using Sailfish; the compositor, UI libraries (Silica), and most of the "core" apps are still closed source.
The compositor is open (Lipstick) : https://github.com/sailfishos/lipstick And OSS projet based on the SFOS core exist : https://nemomobile.net/ , https://github.com/nemomobile-ux
If we're going to start counting forks, we get to count LineageOS and GrapheneOS for Android, and then the goalposts really move.