Sailfishos : dependency to AOSP roots?

[fingus]

A very good explanation can be found here:

Android layers on Jolla C2

To go into details, it’s multiple layers: at the bottom of the layers, the manufacturer of the chipset (e.g. Qualcom) usually only produces drivers that are designed to run in Android (including some of the unusual library and interface that Android runs unlike other Linux based OS) on top of the hardware SailfishOS is relatively standard GNU/Linux distro (audio handled with pulseaudio, graphics with waydroid, etc. has a standard C library) Jolla use a special compatibility layer (libhybris)…