Nitpick: Android is not FOSS. The parts from the Android Open Source Project (AOSP) are. Everything else, including the Play Services later and all the default

Nitpick: Android is not FOSS. The parts from the Android Open Source Project (AOSP) are. Everything else, including the Play Services later and all the default Google services/apps (like a Play Store, Maps and others) installed on Android devices are all proprietary and closed source. Also, Android being “simply unreplaceable” depends on the person, their needs and what they can adapt to.