Are there any alternative mobile OSes actively developed? I remember Ubuntu Touch was the thing and something from Firefox, but not sure if they are continued?
We also have PostmarketOS (alpine base) and Mobian (debian base) as frontrunners. Supposedly Arch Linux for ARM and openSUSE Tumbleweed are also used by some on mobile.
There's HarmonyOS [1], which is developed by Huawei, and which has a similar mix of open (OpenHarmony) and proprietary components. I haven't used it, but it's supported by quite a few phones and sort of surprised it wasn't mentioned anywhere on this thread.
